if and only if

Conjunction CEFR C2

ɪf ən(d)ˈəʊn.li ɪf

Definitions

Is equivalent to; implies and is implied by; is true and false in the same cases as.
Synonym of if (with added intensity)
broadly, informal

Equivalents

Españolsi y solo si

Françaissi et seulement si

Deutschdann und nur dann, wenn genau dann, wenn

18 more languages

العربيةشَرْطَ أَنّ شَرِيطَةً أَن فَقَط إِذَافَقَط فِي حَالَة

Češtinaprávě tehdy, když

Danskhvis og kun hvis

Ελληνικάαν και μόνο αν

Euskarabaldin eta soilik baldin

Suomijos ja vain jos

Gaeilgeis gá agus is leor

עבריתאם ורק אם אםם

Italianose e solo se

ქართულიმხოლოდ იმ შემთხვევაში, თუ

Nederlandsals en slechts als dan en slechts dan als

Polskiekwiwalencja równoważność wtedy i tylko wtedy

Portuguêsse e somente se

Românădacă și numai dacă

Русскийтогда́ и то́лько тогда́

Svenskaom och endast om

Türkçeancak ve ancak

Tiếng Việtkhi và chỉ khi

Examples

“A rectangle is a square if and only if all four of its sides have ⟳ the same length.”

“An integer is even if and only if its square is also even.”

“I'll let ⟳ you go to the concert if and only if you clean ⟳ your room.”

CEFR level

C2

Mastery
This word is part of the CEFR C2 vocabulary — mastery level.

See all C2 English words →

See also

if and when if it be so if not if only if so be if'n

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