oblige. verb \ə-ˈblīj\. Tweet. : to force or require (someone or something) to do something because of a law or rule or because it is necessary. : to do something that someone has asked you to do: to do a favor for (someone).ull Definition of OBLIGE. transitive verb. 1. 2. intransitive verb. : to do something as or as if as a favor. — oblig·er noun. See oblige defined for English-language learners.