1. (n.) A minute portion of time; a point of time; an instant; as, at that very moment.

2. (n.) Impulsive power; force; momentum.

3. (n.) Importance, as in influence or effect; consequence; weight or value; consideration.

4. (n.) An essential element; a deciding point, fact, or consideration; an essential or influential circumstance.

5. (n.) An infinitesimal change in a varying quantity; an increment or decrement.

6. (n.) Tendency, or measure of tendency, to produce motion, esp. motion about a fixed point or axis.