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).
exâ¢tracâ¢tive. 1. serving to extract or based upon extraction: oil and other extractive industries. 2. capable of being extracted: extractive fuels. 3. of or of the nature of an extract. 4. something extracted or extractable.