1
a
: in the event that
b
: allowing that
c
: on the assumption that
d
: on condition that
2
: whether
asked if the mail had come
I doubt if I'll pass the course
3
used as a function word to introduce an exclamation expressing a wish
if it would only rain
4
: even though : although perhaps
an interesting if untenable argument
5
: and perhaps not even
few if any changes are expected
often used with not
difficult if not impossible
1
: condition, stipulation
the question … depends on too many ifs to allow an answer Encounter
2
Phrases
if anything
: on the contrary even : perhaps even
if anything, you ought to apologize

Examples of if in a Sentence

Noun There are too many ifs in this proposal. your conclusion may turn out to be accurate, but you're postulating a lot of ifs
Recent Examples on the Web
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Noun
So which team has best chance of actually winning? Keeler: Deion Sanders taking CU Buffs to College Football Playoff feels like when, not an if. Sean Keeler, The Denver Post, 10 Dec. 2024

Word History

Etymology

Conjunction

Middle English, from Old English gif; akin to Old High German ibu if

First Known Use

Conjunction

before the 12th century, in the meaning defined at sense 1a

Noun

1513, in the meaning defined at sense 1

Time Traveler
The first known use of if was before the 12th century

Browse Nearby Words

Cite this Entry

“If.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/if. Accessed 26 Mar. 2025.

Kids Definition

if

1 of 2 conjunction
1
: in the event that
come if you can
2
: whether it is or was true that
asked if the mail had come
3
used to introduce a wish
if it would only rain
4
: even though : but
an interesting if unbelievable excuse
1
: condition entry 1 sense 3, stipulation
too many ifs make the contract confusing
2
: supposition sense 1
a theory full of ifs

Medical Definition

IF

abbreviation
interferon

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