1. (noun)growth, growing, maturation, development, ontogeny, ontogenesis (biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level Synonyms: development, emergence, ripening, maturation, suppuration, increase, ontogenesis, maturement, growth, evolution, developing, outgrowth, ontogeny, increment, exploitation, growing, festering