[dih-mahr-key-tiv, dee-mahr-key-]
adjective Linguistics.
  1. (of a phonological feature) serving to indicate the beginning or end of each successive word in an utterance, as word-initial stress in Hungarian or penultimate stress in Polish.
Also de·mar·ca·tion·al [dee-mahr-key-shuh-nl] /ˈdi mɑrˌkeɪ ʃə nl/.

Origin of demarcative

First recorded in 1950–55; demarcate + -ive Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018