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power to be effective; the quality of being able to bring about an effect


attribute noun (attributes of people and objects)

Related to:




Original source:

Princeton WordNet


effectual + -ity
(Source: Wiktionary)  [more]

Definition references

Collins Dictionary:

effectiveness | effective | effectivity [synonym] | operative [synonym, sense-specific] | impressive [synonym, sense-specific] | real [synonym, sense-specific] | effectively [adverb, derived]

efficiency and success or how efficient and successful something is | productive of or capable of producing a result | in effect; operative | ... (21 of 569 words, 8 definitions, 14 usage examples, pronunciations)



effective [entry 1, adjective] | actual [synonym, sense-specific] | operative [synonym, sense-specific] | impressive [synonym, sense-specific] | striking [synonym, sense-specific] | effectual [synonym, sense-specific] | efficacious [synonym, sense-specific] | efficient [synonym, sense-specific] | fruitful [synonym, sense-specific] | ...

producing a decided, decisive, or desired effect ; "impressive", "striking" | ready for service or action | "actual" | being in effect; "operative" | ... (20 of 468 words, 5 definitions, 9 usage examples, pronunciations)


Oxford Dictionary:

effective | effectivity [derived]

successful in producing a desired or intended result | (of a law, rule, or policy) operative | [attributive] : existing in fact, though not formally ... (23 of 119 words, 5 definitions, 5 usage examples, pronunciations)


American Heritage Dictionary:

effective | effectiveness [noun, related] | effectivity [noun, related]

Having an intended or expected effect. | Producing a strong impression or response; striking | Operative; in effect | Existing in fact; actual | ... (20 of 77 words, 6 definitions, 4 usage examples, pronunciation)



effectivity | effectivities [plural]

[uncountable] The ability or power to be effective. | [countable] A measure of the effectiveness of something. (16 of 17 words, 2 definitions)


New World Dictionary:

effectual | effectuality [noun, related]

producing, or able to produce, the desired effect | having legal force; valid (12 of 32 words, 2 definitions, pronunciations)




the capability of producing a desired result. When something is deemed effective, it means it has an intended or expected outcome, or produces a deep, vivid impression. The origin of the word "effective" stems from the Latin word effectīvus, which... (40 of 722 words)


Macmillan British Dictionary:

effective | effectiveness [noun, uncountable, related]

someone or something that is effective works well and produces the result ... | [formal] when a law or agreement becomes effective, it officially ... (23 of 196 words, 3 definitions, 9 usage examples, pronunciation)


Random House Dictionary:

power | pwr [abbreviation] | powers [sense-specific] | the powers that be [sense-specific] | power down [sense-specific] | power up [sense-specific] | P [symbol, sense-specific] | cardinal number [definition 2, sense-specific] | power-assisted [definition 2, sense-specific]

ability to do or act; capability of doing or accomplishing something. | political or national strength. | great or marked ability to do or act; ... (23 of 546 words, 32 definitions, 23 usage examples, pronunciation)


Britannica Encyclopedia:

power [physics]

in science and engineering, time rate of doing work or delivering energy, expressible as the amount of work done W, or energy transferred, divided by ... (25 of 222 words)


Columbia Encyclopedia:

exponent | power

in mathematics, a number, letter, or algebraic expression written above and to the right of another number, letter, or expression called the base. In ... (24 of 213 words)



in physics, time rate of doing work or of producing or expending energy. The unit of power based on the English units of measurement is the ... (26 of 145 words)


Cambridge Dictionary:

power [entry 1]

ability to control people and events | the amount of political control a person or group has in a country (19 of 87 words, 2 definitions, 6 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 1

power [entry 2]

strength (1 of 47 words, 4 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 2

power [entry 3] | powers

an official or legal right to do something | "powers": authority (10 of 85 words, 2 definitions, 5 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 3

power [entry 4]

electricity, especially when considering its use or production (8 of 38 words, 3 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 4

power [entry 5] | powers

"powers": abilities | a natural skill or an ability to do something (11 of 57 words, 2 definitions, 3 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 5

power [entry 6]

a person, organization or country that has control over others, often because of wealth, importance or great military strength (19 of 64 words, 3 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 6

power [entry 7]

the rate at which energy is used, or the ability to produce energy (13 of 51 words, 2 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 7

power [entry 8]

the amount by which an image is increased by a device used for seeing things that are very small or a long distance away (24 of 64 words, 3 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 8

power [entry 9, singular]

[specialized] the number of times that a number is to be multiplied by itself (14 of 46 words, 2 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 9

power [entry 10]

to provide a machine with energy and the ability to operate (11 of 37 words, 2 usage examples, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 10

power [entry 11]

to act with great strength or in a forceful way (10 of 35 words, 1 usage example, pronunciations)

dictionary​.cambridge​.org​/dictionary​/british​/power 11

Encarta Dictionary:

effective | effectives [plural] | effectiveness [noun, derived] | effectivity [noun, derived]

producing a result | causing a result, especially the desired or intended result | successful, especially in producing a strong or favorable ... (20 of 243 words, 8 definitions, pronunciations)

encarta​.msn​.com​/dictionary 1861607587​/definition​.html  [offline]

Etymology reference


effectuality | effectualities [plural]

Origin: effectual + -ity


effectual | effectuall [obsolete]

Origin: effect + -al



Origin: French -ité, from Middle French -ité, from Old French -ete, -eteit ("-ity"), from Latin -itātem, from -itās, from Proto-Indo-European *-it- (suffix). Cognate with Gothic -___... (25 of 41 etymology words)


Audio references

the Free Dictionary:


Audio 1: North American English pronunciation of "effectivity"

Audio 2: British English pronunciation of "effectivity"



Audio: British English pronunciation of "effectuality"


Merriam-Webster Pronunciation:


Audio: North American pronunciation of "effectivity"

www​.merriam-webster​.com​/audio​.php file=effect​03 word=effectivity


Audio: North American pronunciation of "effectuality"

www​.merriam-webster​.com​/audio​.php file=effect​07 word=effectuality

Page last updated: 2013-06-26

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