[adj] - of words so related that one contrasts with the other 2. [adj] - (grammar) syntactically establishing a relationship of contrast between sentences or elements of a sentence Found on http://www.webdictionary.co.uk/definition.php?query=contrastive
tending to contrast; contrasting. contrastive colors. · studying or exhibiting the congruences and differences between two languages or dialects without reference to their origins: contrastive linguistics. Found on https://www.infoplease.com/dictionary/contrastive
Refers to any elements which are in opposition to each other. A phonetic distinction is contrastive if it has significance on the phonological level, i.e. if it distinguishes meaning. Found on https://www.uni-due.de/ELE/LinguisticGlossary.html