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Definition of Instant
1. Noun. A very short time (as the time it takes the eye to blink or the heart to beat). "If I had the chance I'd do it in a flash"
Generic synonyms: Bit, Minute, Mo, Moment, Second
Derivative terms: Flash
2. Adjective. Occurring with no delay. "Instant gratification"
3. Noun. A particular point in time. "The moment he arrived the party began"
Specialized synonyms: Climax, Culmination, Eleventh Hour, Last Minute, Moment Of Truth, Moment Of Truth, Pinpoint, Time, Psychological Moment
Generic synonyms: Point, Point In Time
Derivative terms: Instantaneous
4. Adjective. In or of the present month. "Your letter of the 10th inst"
5. Adjective. Demanding attention. "An instant need"
Similar to: Imperative
Derivative terms: Exigency, Exigency, Insistency, Instancy
Definition of Instant
1. a. Pressing; urgent; importunate; earnest.
2. adv. Instantly.
3. n. A point in duration; a moment; a portion of time too short to be estimated; also, any particular moment.
Definition of Instant
1. a very short time [n -S]
Medical Definition of Instant
1. 1. A point in duration; a moment; a portion of time too short to be estimated; also, any particular moment. "There is scarce an instant between their flourishing and their not being." (Hooker) 2. 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. Synonym: Moment, flash, second. Origin: F. Instant, fr. L. Instans standing by, being near, present. See Instant. Source: Websters Dictionary (01 Mar 1998)