expPronunciation: /ɛksp/Definition of exp abbreviation experience (usually in the context of job advertisements):previous exp an advantage (Exp.) experimental (in titles of periodicals): J. Exp. Biol expiry:exp date Mathematics the exponential function raising e to the power of the given quantity:it is reduced by exp (−U) Photography exposures: £4.45 for 24 expexp in other Oxford dictionaries Definition of exp in the US English dictionary