Find over 25,000 psychological definitions


n. a self-contained unit comprising a community of individuals of different species and the environment they inhabit. There is an interdependent balance of predators, prey, food resources, and substrates such that a change in any one component is often followed by commensurate changes in the other components.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

March 3rd 2024

closed-class words

closed-class words

in a language, a category of words that does not readily admit new members, consisting mainly of words that serve key grammatical functions, such as pronouns, prepositions, and determiners (see function word). Compare open-class words.