definitions

if

[ if ]
/ ɪf /
||
SEE MORE SYNONYMS FOR if ON THESAURUS.COM

conjunction

noun

a supposition; uncertain possibility: The future is full of ifs.
a condition, requirement, or stipulation: There are too many ifs in his agreement.

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RELATED WORDS

whenever, wherever

Nearby words

ied, iee, iep, ieper, ieyasu, if, if anything, if at first you don't succeed, try, try again, if it ain't broke don't fix it, if music be the food of love, play on, if only

Idioms

    ifs, ands, or buts, reservations, restrictions, or excuses: I want that job finished today, and no ifs, ands, or buts.

Origin of if

before 900; Middle English, variant of yif, Old English gif, gef; akin to Old Norse ef if, Gothic ibai whether, Old High German iba condition, stipulation

SYNONYMS FOR if

1, 2 If, provided, providing imply a condition on which something depends. If is general. It may be used to indicate suppositions or hypothetical conditions (often involving doubt or uncertainty): If you like, we can go straight home. If I had known, I wouldn't have gone. If may mean even though: If I am wrong, you are not right. It may mean whenever: If I do not understand, I ask questions. Provided always indicates some stipulation: I will subscribe ten dollars provided ( on the condition ) that you do, too. Provided he goes, we can go along. Providing means the same as provided, that is, just in case some certain thing should happen: We will buy the house, providing ( provided ) we can get a mortgage.
SEE MORE SYNONYMS FOR if ON THESAURUS.COM

Usage note

If meaning “whether,” as in I haven't decided if I'll go, is sometimes criticized, but the usage has been established in standard English for a long time.

Definition for if (2 of 2)

if

or IF

Radio.

intermediate frequency.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for if (1 of 2)

if

/ (ɪf) /

conjunction (subordinating)

noun

an uncertainty or doubtthe big if is whether our plan will work at all
a condition or stipulationI won't have any ifs or buts

Word Origin for if

Old English gif; related to Old Saxon ef if, Old High German iba whether, if

British Dictionary definitions for if (2 of 2)

IF

i.f.

/ electronics /

abbreviation for

intermediate frequency
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

Medicine definitions for if

IF

abbr.

initiation factor
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Idioms and Phrases with if

if

In addition to the idioms beginning with if

  • if anything
  • if at first you don't succeed, try, try again
  • if it ain't broke don't fix it
  • if only
  • if the mountain won't come to Muhammad, Muhammad must go to the mountain
  • if the shoe fits, wear it
  • if wishes were horses
  • if worst comes to worst
  • if you can't beat 'em, join 'em
  • if you can't stand the heat, get out of the kitchen

also see:

  • as if
  • damned if I do, damned if I don't
  • make as if to
  • no ifs or buts
  • nothing if not
  • (if) push comes to shove
  • what if
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.