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Definition of instant:

  1. 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, a., 3.
  2. A point in duration; a moment; a portion of time too short to be estimated; also, any particular moment.
  3. Closely pressing or impending in respect to time; not deferred; immediate; without delay.
  4. Instantly.
  5. Present; current.
  6. Pressing; urgent; importunate; earnest.


at once, blink, secondment, clamorous, New York minute, import, imperative, nictation, news bulletin, second base, exacting, arcminute, irregular, time, ready-to-use, blinking, point, immediately, jiffy, rank, instantly, flash, time, trice, strident, flare, pulsation, forthwith, big, mo, moment, second, beat, prepared, newsbreak, precooked, fast, premixed, straight off, right off, crying, bit, flash bulb, straightaway, first off, on-the-spot, blatant, gross, jiff, eye blink, flashing, minute, endorsement, fanfare, glaring, s, exigent, flagrant, immediate, egregious, directly, repetitive, wink, minute of arc, ready-to-serve, sec, vociferous, inst, second gear, ostentation, flash lamp, flashbulb, right away, twinkling, pulse, nictitation, newsflash, winking, instantaneous, tick, twinkle, insistent, clamant, arcsecond, heartbeat, hour, indorsement, split second, crack, flashgun, ready-to-eat, present moment, blink of an eye, prompt, present, min, consequence, photoflash.

Usage examples:

  • " Two hundred and fifty dollars," was the instant reply.

    - "Personal Reminiscences of Early Days in California with Other Sketches; To Which Is Added the Story of His Attempted Assassination by a Former Associate on the Supreme Bench of the State", Stephen Field; George C. Gorham.
  • They rushed upon me; in an instant I was on foot.

    - "Marie", Alexander Pushkin.
  • I did- wrote the instant I got the paper.

    - "The Mystery of The Barranca", Herman Whitaker.