Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
nonrestrictive is an adjective meaning "not limiting the reference of a modified word or phrase". It carries one recorded sense.
not limiting the reference of a modified word or phrase
“the nonrestrictive clause in `I always buy his books, which have influenced me greatly,' refers to his books generally and adds an additional fact about them”
grammar
Definitions, synonyms and semantic relations for nonrestrictive come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .