1. The act of developing or disclosing that which is unknown; a gradual unfolding process by which anything is developed, as a plan or method, or an image upon a photographic plate; gradual advancement or growth through a series of progressive changes; also, the result of developing, or a developed state. A new development of imagination, taste, and poetry. (Channing)
(Science: biology) development theory, the doctrine that animals and plants possess the power of passing by slow and successive stages from a lower to a higher state of organization, and that all the higher forms of life now in existence were thus developed by uniform laws from lower 596
alternative forms: developement. (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; he proposed an indicator of osseous development in children.Processing a photosensitive material in order to make an image visible; the development and printing of his pictures took only two hours.The growing stage of organisms from embryo to adult.