follow Dictionary.com

Is irregardless a word?

instantaneous

[in-stuh n-tey-nee-uh s] /ˌɪn stənˈteɪ ni əs/
adjective
1.
occurring, done, or completed in an instant:
an instantaneous response.
2.
existing at or pertaining to a particular instant:
the instantaneous position of the rocket.
Origin of instantaneous
1645-1655
1645-55; < Medieval Latin instantāneus. See instant, -an, -eous
Related forms
instantaneity
[in-stan-tn-ee-i-tee, in-stuh n-tuh-nee-] /ɪnˌstæn tnˈi ɪ ti, ˌɪn stən təˈni-/ (Show IPA),
instantaneousness, noun
instantaneously, adverb
Synonyms
1. immediate, sudden, abrupt.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the Web for instantaneously
Contemporary Examples
Historical Examples
  • Still the answer followed as instantaneously, 'they are;' still the result accompanied it,—surely some person should interfere.

  • He sees at one glance and instantaneously all the past, present, and future.

  • It sighed threateningly for a moment, and instantaneously became silence.

    Overland John William De Forest
  • Smoothly and instantaneously as a shadow Reddin eluded the attack.

    Earth's Enigmas Charles G. D. Roberts
  • Awakened so instantaneously, her recollection, for a time, was confused and imperfect.

    Alonzo and Melissa Daniel Jackson, Jr.
  • I have never seen a stranger who won my regard so instantaneously.

    Ernest Linwood Caroline Lee Hentz
  • These, to use the words of the reports by the magistrate were instantaneously consumed.

    Montreal 1535-1914, Volume II (of 2) William Henry Atherton
British Dictionary definitions for instantaneously

instantaneous

/ˌɪnstənˈteɪnɪəs/
adjective
1.
occurring with almost no delay; immediate
2.
happening or completed within a moment: instantaneous death
3.
(maths)
  1. occurring at or associated with a particular instant
  2. equal to the limit of the average value of a given variable as the time interval over which the variable is considered approaches zero: instantaneous velocity
Derived Forms
instantaneously, adverb
instantaneousness, instantaneity (ɪnˌstæntəˈniːɪtɪ) noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for instantaneously

instantaneous

adj.

1640s (implied in instantaneously), formed in English from Medieval Latin *instantaneus, from instantem (see instant (n.)) on model of spontaneous. Related: Instantaneousness.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for instantaneous

Few English speakers likely know this word

Word Value for instantaneously

18
22
Scrabble Words With Friends