That is in possession of knowledge; knowledgeable; well-informed, learned, practised, expert. Formerly also: †having intelligence or understanding…

Knowledgeable, well-informed.

Knowledgeable; skilled.

In predicative use (chiefly with modifying adverb): informed, notified, apprised, warned. Obsolete.

Provided with much information, or with the information most pertinent or relevant to a particular matter; having or showing much knowledge about…

Knowledgeable, learned.

Crafty, cunning; knowledgeable. Cf. callid, adj.2

Knowing, wide-awake, sharp. fly to (anything): ‘up’ to, well acquainted with, clever at.

Originally Irish English. Possessing or showing knowledge; well-informed, well-read; sagacious, wise, educated.

Knowing many facts.

Having great knowledge; deep, insightful, astute. Cf. shrewd, adj. 13.

English regional (northern). Well-informed, knowledgeable. Now rare.

Awake; that has not gone to sleep or has been woken up. Also figurative and in figurative context: in a state of awareness; alert, well-informed…

colloquial. in the know: in possession of information which is not generally known; well-informed.

to be (or get) jerry (on, on to, to): to be aware (of); to be ‘wise’ (to); to understand.

Aware, well-informed; in the know (about something). Often in to be hipped on: to well-informed on (an issue or subject).

Well informed, knowledgeable. Cf. clueless, adj. b.

informed; well supplied with information or facts.

To inform, tell (someone); to provide with a clue; also with up. So to clue up: to get to know about; clued (up) participial adjective, informed…