[kil-er] /ˈkɪl ər/
a person or thing that .
a device used by a post office for printing cancellations on postage stamps.
a mark of cancellation made on a postage stamp.
Slang. something or someone having a formidable impact, devastating effect, etc.:
The math test was a real killer.
a killer cold.
very difficult or demanding:
a killer chess tournament.
highly effective; superior:
a killer recipe for fried chicken.
something, esp a task or activity, that is particularly taxing or exhausting
(Austral & NZ) an animal selected to be slaughtered for food
late 15c., agent noun from kill (v.). But a surname, Ric[hard] Le Kyller is attested from 1288. Figurative use from 1550s. Meaning “impressive person or thing” is by 1900 (as an adjective, 1979); reduplicated form killer-diller attested by 1938. Killer whale is from 1725; killer instinct is attested from 1931, originally in boxing.
(also killer-diller): not only was it a killer version/ The killer idea of the century is about to be laid on you (1970s+)
1. an application that surpasses its competitors. noun See killer application
- Killer application
noun 1. a highly innovative, very powerful, or extremely useful computer application; esp one sufficiently important as to justify purchase of the equipment or software noun any computer program that is so useful or great that people feel they must have it; also called killer app Word Origin killer ‘impressive, excellent’ + (computer) application Usage […]
noun, (used with a plural verb) 1. an imprint consisting of a series of wavy lines used to cancel postage stamps.
noun 1. a honeybee, Apis mellifera adansonii, native to Africa, that is extremely aggressive and attacks in swarms when disturbed: brought to Brazil and accidentally released there in 1956. 2. an American hybrid of the African and European honeybees produced by the mingling of domesticated European colonies with an expanding and migrating African colony that […]