|a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|1.||to compel, constrain, or oblige morally or legally|
|2.||(in the US) to bind (property, funds, etc) as security|
|3.||compelled, bound, or restricted|
|4.||biology Compare facultative able to exist under only one set of environmental conditions: an obligate parasite cannot live independently of its host|
|[C16: from Latin obligāre to |
obligate ob·li·gate (ŏb'lĭ-gĭt, -gāt')
Able to exist or survive only in a particular environment or by assuming a particular role.
|obligate (ŏb'lĭ-gĭt, -gāt') Pronunciation Key
Capable of existing only in a particular environment or by assuming a particular role. An obligate aerobe, such as certain bacteria, can live only in the presence of oxygen. An obligate parasite cannot survive independently of its host. Compare facultative.