(1):
(n.) An infinitesimal change in a varying quantity; an increment or decrement.
(2):
(n.) An essential element; a deciding point, fact, or consideration; an essential or influential circumstance.
(3):
(n.) A minute portion of time; a point of time; an instant; as, at thet very moment.
(4):
(n.) Impulsive power; force; momentum.
(5):
(n.) Importance, as in influence or effect; consequence; weight or value; consideration.
(6):
(n.) Tendency, or measure of tendency, to produce motion, esp. motion about a fixed point or axis.