Definition of "Moment" :

noun: having important effects or influence

"Virtue is of more moment than security."

noun: the n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value

noun: a turning force produced by an object acting at a distance (or a measure of that force)

noun: at this time

"She is studying at the moment."

noun: a particular point in time

"The moment he arrived the party began."

noun: an indefinitely short time

"Wait just a moment."