ob·li·gate ( b l -g t )tr.v. ob·li·gat·ed, ob·li·gat·ing, ob·li·gates 1. To bind, compel, or constrain by a social, legal, or moral tie. See Synonyms at force. 2. To cause to be grateful or indebted; oblige. 3. To commit (money, for example) in order to fulfill an obligation. adj. (-g t, -gt)1. Biology Able to exist or survive only in a particular environment or by assuming a particular role: an obligate parasite; an obligate anaerobe. 2. Absolutely indispensable; essential. [Latin oblig re, obligt-; see oblige.]ob li·ga·ble (-g -bl) adj.ob li·gate·ly adv.ob li·gator n. |
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