To make alike; cause to resemble.In philology, to render accordant, or less discordant, in sound; bring to or toward agreement in mode of utterance: said of alphabetic sounds as affected by other neighboring sounds, generally (but not always) in the same word. See assimilation, .To compare; liken; class.To convert into a substance suitable for absorption by an animal or vegetable system; absorb and incorporate into the system; incorporate with organic tissues: as, to assimilate food.To bring into conformity; adapt.To conform to; make one's own; adopt.To become similar; become like something or somebody else; harmonize.To be taken into and incorporated with another body; be converted into the substance of another body, as food by digestion.To perform the act of converting anything, as food, into the substance of that which converts it: as, “birds assimilate … less than beasts,”