Pronunciation: (mō'munt),[key] —n. 1. an indefinitely short period of time; instant: I'll be with you in a moment. 2. the present time or any other particular time (usually prec. by the): He is busy at the moment. 3. a definite period or stage, as in a course of events; juncture: at this moment in history. 4. importance or consequence: a decision of great moment. 5. a particular time or period of success, excellence, fame, etc.: His big moment came in the final game. 6. Statistics.the mean or expected value of the product formed by multiplying together a set of one or more variates or variables each to a specified power.
7. Philos. a. an aspect of a thing.
b. Obs.an essential or constituent factor.
8. Mech. a. a tendency to produce motion, esp. about an axis.
b. the product of a physical quantity and its directed distance from an axis: moment of area; moment of mass.