(idiomatic) A moment of great drama or sentimentality, suggesting the climax of a film.

(physics) The perpendicular distance from a pivot to a point undergoing torque

The moment when a country or a society realizes that it needs to catch up with apparent technological and scientific developments made by some other country or countries by increasing its investment into education, innovative research and development, etc.

A moment during legal or judicial proceedings when evidence or other information, usually unknown to most present, is introduced into the record in a manner seen as determinative of the outcome of the proceedings regardless of whatever else occurs.

(US, slang) A showbusiness manager who is also the performer's mother.

(idiomatic) The moment or instant at which the solution to a problem, or some other significant realization, becomes clear.

Alternative form of aha moment

(obsolete) Lasting only for a moment; brief. / (obsolete) important; momentous / (obsolete, engineering) Of or relating to moment or momentum.

(education) The time at which learning a topic becomes easiest.

(fandom slang) A notably unusual, tangential scene in a movie or similar work of fiction, which occurs without setup and does not affect the story afterward.