Definition of volatile for English Language Learners. : 1  likely to change in a very sudden or extreme way. : 2  having or showing extreme or sudden changes of emotion. : 3  likely to become dangerous or out of control.
expletive (comparative more expletive, superlative most expletive) 1  Serving to fill up, merely for effect, otherwise redundant. 2  Marked by expletives (phrase-fillers).
exclamation noun [C]. âº grammar a word that âexpresses âsudden âpain, âsurprise, âanger, excitement, âhappiness, or other âemotion: Ouch, âhey, and âwow are exclamations. âº a âsudden âexpression of âpleasure, âsurprise, âagreement, etc.: exclamations of âdelight.