An adjective referring to an environmental factor (for example, oxygen) which is always required for growth, for example, obligate aerobe Compare with facultative
commit in order to fulfill an obligation; "obligate money" restricted to a particular condition of life; "an obligate anaerobe can survive only in the absence of OXYGen
Invariably A species which is unable to live outside of a given environment Applied to animals living in the dark zone of caves that may display Troglomorphic adaptions Biology - Flora & Fauna Ref AC
If something obligates you to do a particular thing, it creates a situation where you have to do it. The ruling obligates airlines to release information about their flight delays