Supposing that, assuming that, in the circumstances that; used to introduce a condition or choice.

(informal) An uncertainty, possibility, condition, doubt etc.

Alternative form of yfere

Used other than figuratively or idiomatically: see if, only. / (idiomatic) I wish that; signifies a wish or desire for the present or the future.

(mathematics, logic) If and only if; used to show that the truth values of two statements are the same. / biconditionally / just in case or just in the case that / equal / that is to say / XNOR

(slang) Of dubious authenticity, legitimacy or legality. / Uncertain or chancy.

(logic, mathematics) Is equivalent to; implies and is implied by; is true and false in the same cases as. / (by extension, informal) If, with added intensity

Initialism of interactive fiction. / Initialism of impact factor. / (biochemistry) Initialism of intermediate filament. / (electronics) Initialism of intermediate frequency.

(idiomatic) If it makes no difference; if nobody minds; if it doesn't bother anyone.

(idiomatic) Never.