moment

noun

1. a particular point in time"the moment he arrived the party began"
2. an indefinitely short time"wait just a moment"
3. at this time"the disappointments of the here and now"
4. having important effects or influence"decisions of great consequence are made by the president himself"
5. a turning force produced by an object acting at a distance (or a measure of that force)
6. the n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value