adj present; current.
2. instant ·adv instantly.
3. instant ·adj pressing; urgent; importunate; earnest.
4. instant ·adj closely pressing or impending in respect to time; not deferred; immediate; without delay.
5. instant ·adj a point in duration; a moment; a portion of time too short to be estimated; also, any particular moment.
6. instant ·adj a day of the present or current month; as, the sixth instant;
an elliptical expression equivalent to the sixth of the month instant, ·i.e., the current month. ·see instant, ·adj, 3.