DIFFERENTIATOR Meaning of DIFFERENTIATOR in English ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷ˌād.ə(r), -ātə- noun( -s ) : one that differentiates Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012