efficient
/ɪˈfɪʃənt/ adjective, noun
Forms efficients
- adjective Making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy. “An efficient process would automate all the routine work.”
- adjective Expressing the proportion of consumed energy that was successfully used in a process; the ratio of useful output to total input. “The motor is only 20% efficient at that temperature.”
- adjective Causing effects, producing results; bringing into being; initiating change (rare except in philosophical and legal expression efficient cause = causative factor or agent). “Ownership, maintenance, or use of the automobile need not be the direct and efficient cause of the injury sustained”
- adjective (proscribed, old use) effective, efficacious
- noun (obsolete) A cause; something that causes an effect.
Synonyms
Antonyms
Etymology
1398, “making,” from Old French, from Latin efficientem, nominative efficiēns, participle of efficere (“work out, accomplish”) (see effect). Meaning “productive, skilled” is from 1787. Efficiency apartment is first recorded 1930, American English.
Webster’s 1913
- adjective Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.
- noun An efficient cause; a prime mover.
Etymology [L. efficiens, -entis, p. pr. of efficere to effect: cf. F. efficient. See Effect, n.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “efficient”, CC BY-SA 4.0. Details