canary

IPA: kʌnˈɛri

A small, usually yellow, finch (genus Serinus), a songbird native to the Canary Islands.
Any of various small birds of different countries, most of which are largely yellow in colour.
(informal) A female singer, soprano, a coloratura singer.
(slang) An informer or snitch; a squealer.
A light, slightly greenish, yellow colour.
(slang) A (usually yellow) capsule of the short-acting barbiturate pentobarbital/pentobarbitone (Nembutal).
(Australia, informal) A yellow sticker applied by the police to a vehicle to indicate it is unroadworthy.
Any test subject, especially an inadvertent or unwilling one. (From the mining practice of using canaries to detect dangerous gases.)
(computing) A value placed in memory such that it will be the first data corrupted by a buffer overflow, allowing the program to identify and recover from it.
(computing) A change that is tested by being rolled out first to a subset of machines or users before rolling out to all.
(countable, uncountable) A light, sweet, white wine from the Canary Islands.
A lively dance, possibly of Spanish origin (also called canaries).
(soccer) Someone connected with Norwich City Football Club, as a fan, player, coach etc.

(intransitive) to dance nimbly (as in the canary dance)
(slang) to inform or snitch, to betray secrets, especially about illegal activities.
(computing) to test a software change by rolling out to a small set of machines or users before making it available to all.

Of a light yellow colour.
(finance, of an option) That can be exercised on quarterly dates, a set time period (usually one year) after the issue date, and before the expiry date.

Examples of "canary" in Sentences