1. Absence or non-recognition of the marriage relation [literally, 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 fission (process in which a cell divides into two or more parts), budding (asexual production of new organisms), or other agamic procedures."
3. In botany, a reference to all flowerless and seedless plants that reproduce by means of spores; including, ferns, mosses, algae, and fungi: "The agamies of plants consist of ferns and algae which do not bear flowers or seeds, but reproduce with spores."