n. The process of ripening or coming to maturity; a bringing to maturity; hence, a carrying out; consummation.n. In medicine, a ripening or maturing, as of an abscess; formation of pus; suppuration.n. In cytology and embryology, the final stage in the development of the germcells (ovum and spermatozoön). This stage is characterized by certain changes in the chromosomes, especially a reduction in their number to one half of that of the chromosomes in the somatic or body cells.