(cooking) A dish whose essential ingredients are combined in a single pot for cooking.

At one’s convenience.

(idiomatic, Ireland) The same age as; (followed by a name).

Alternative spelling of one-liner

plural of one liner

(billiards) A pool game in which points are scored by potting balls into specific designated pockets.

Alternative form of at one stroke

(literally) With a single blow, effort, or act. / (figuratively, by extension) At once, immediately; in an instant.

plural of one-upmanship

In a watchful state; alert; vigilant.