1. Absence or nonrecognition of the marriage relation or no marriage: There are some people who believe in agamy which is the rejection of any requirement that marriage is necessary.
2. In biology, having no distinguishable sexual organs; asexual: There are species of agamy that reproduce by the process in which a cell divides into two or more parts.
3. In botany, a reference to all flowerless and seedless plants that reproduce by means of spores: The agamies of plants consist of ferns and algae which do not bear flowers or seeds but reproduce with the scattering of cells that propagate or develop new organisms.