'ecology' definitions:

Definition of 'ecology'

From: WordNet
noun
The environment as it relates to living organisms; "it changed the ecology of the island"
noun
The branch of biology concerned with the relations between organisms and their environment [syn: ecology, bionomics, environmental science]

Definition of 'ecology'

From: GCIDE
  • ecology \ecology\ ([-e]*k[o^]l"[-o]*j[y^]), n. [Gr. o'i^kos house + -logy.] (Biol.) the branch of biology concerned with the various relations of animals and plants to one another and to their surrounding environment. [PJC]