1. the branch of biology dealing with the form and structure of organisms.
2. the form and structure of an organism considered as a whole.
3. Linguistics: a) the patterns of word formation in a particular language, including inflection, derivation, and composition. b) the study and description of such patterns. c) the study of the behavior and combination of morphemes.
4. Physical Geography: geomorphology.
5. the form or structure of anything: to gain an insight into the morphology of our political system.
6. the study of the form or structure of anything.
Etymology: first formed in German Morphologie (1817), ultimately from Greek morphḗ, “form, structure” + Latin logia, from Greek logos, “word”.