Definition of obligating:
(v) :
(transitive) To bind, compel, constrain, or oblige by a social, legal, or moral tie.
(v) :
(transitive, Canada, US, Scotland) To cause to be grateful or indebted; to oblige.
(v) :
(transitive, Canada, US, Scotland) To commit (money, for example) in order to fulfill an obligation.
(adj) :
Indispensable; essential; necessary; obligatory; mandatory; unavoidably invoked.
(adj) :
(biology) Requiring a (specified) way of life, habitat, etc.
(n) :
(biology) An obligate organism.