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1. A very short time (as the time it takes the eye to blink or the heart to beat)
   - blink of an eye, flash, heartbeat, jiffy, split second, trice, twinkling, wink, New York minute, jiff
    
2. A particular point in time
   - moment, minute, second

1. Occurring with no delay
   "instant gratification"
   - instantaneous
    
2. In or of the present month
   - inst
    
3. Demanding attention
   "an instant need"
   - clamant, crying, exigent, insistent

Derived forms: instants

See also: fast, imperative, instancy, present

Type of: bit, minute, mo, moment, point, point in time, second

Encyclopedia: Instant