A long time ago; at some time in the past (a traditional beginning of children's stories, especially fairy tales).

A monocotyledonous plant (Allium cepa), allied to garlic, used as vegetable and spice. / The bulb of such a plant. / (uncountable) The genus Allium as a whole. / (slang, of a drug) An ounce.

(transitive, idiomatic) To encourage or coax a person to do something, especially something foolhardy or reckless.

(slang, idiomatic) To confess, or to divulge secrets, typically speaking freely and at length after a change of motive or an incentive. / (slang, idiomatic) To vomit.

(Britain) Available for purchase. / (US) Available for purchase at reduced prices.

(obsolete, slang) A bad bill of exchange, drawn on persons who have no effects of the drawer.

(motor racing) Holding the last qualifying position with qualification still in progress, and thus liable to lose that position.

a ketone / any similar compound containing a carbonyl functional group

(Britain, slang) To undress or be naked.

(slang) To become angry.