Noun

(countable, uncountable) Any plant of the family Poaceae, characterized by leaves that arise from nodes in the stem and leaf bases that wrap around the stem, especially those grown as ground cover rather than for grain.

*

, title= Mr. Pratt's Patients, chapter=1 , passage='Twas early June, the new grass was flourishing everywheres, the posies in the yard—peonies and such—in full bloom, the sun was shining, and the water of the bay was blue, with light green streaks where the shoal showed.}}

(countable) Various plants not in family Poaceae that resemble grasses.

(uncountable) A lawn.

(uncountable, slang) Marijuana.

(countable, slang) An informer, police informer; one who betrays a group (of criminals, etc) to the authorities.

(uncountable, physics) Sharp, closely spaced discontinuities in the trace of a cathode-ray tube, produced by random interference.

(uncountable, slang) Noise on an A-scope or similar type of radar display.

The season of fresh grass; spring.

* Latham

two years old next grass

(obsolete, figurative) That which is transitory.

* Bible Is. xl. 7

Surely the people is grass .

Noun

(canaries)

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.

A light, slightly greenish, yellow colour.

A light, sweet, white wine from the Canary Islands.

* 1599 , , III. ii. 80:

I will to my honest knight / Falstaff, and drink canary with him.

A lively dance, possibly of Spanish origin (also called canaries ).

* 1598 , , II. i. 74:

and make you dance canary / With sprightly fire and motion;

Any test subject, especially an inadvertent or unwilling one. (From the mining practice of using canaries to detect dangerous gases.)

(informal) A female singer, soprano, a coloratura singer.

(slang) An informer or snitch; a squealer.

(slang) A (usually yellow) capsule of the short-acting barbiturate pentobarbital/pentobarbitone (Nembutal).

(Australia, informal) A yellow sticker of unroadworthiness.

* {{quote-newsgroup

, title=Warning About Speed Traps , group=alt.folklore.urban , author=Jacco Zwetsloot , date=September 12 , year=1993 , passage=The tendency in these types of situations (as far as I can see) is that because I don't think the act itself is illegal, the police will go through your vehicle systematically loking for anything wrong with it, to slap a canary on it (that's slang for an unroadworthy sticker) or present you with some other fine. citation

* {{quote-newsgroup

, title=Noisy Bikes (Update) , group=aus.motorcycles , author=Garry Lawson , date=January 16 , year=1999 , passage=Yes, if the exhaust is to noisey(sic) they can slap a yellow canary on it, but the[n] who cares you got rid of it. citation

* {{quote-newsgroup

, title=Spare tyres , group=aus.cars , author=Noddy , date=February 14 , year=2003 , passage=You don't have to carry a spare wheel for a car to be roadworthy, and if you *do* carry one, it doesn't have to be in a roadworthy condition *unless* you fit it [to] the car and drive on it.
If it's not and you get pinched, expect a canary ... citation