(a) With ref. to a solid body, an object or a structure perceived as solidly filled with something, etc.: on the inside, in the interior; also in fig. context; sik within, nauseated (b) with ref. to……

With ref. to a physical place (literal or fig.): (a) inside that place, within it; with ref. to gates or a screen: within its or their confines; also, with verb of motion: into that place [quot……

(a) Wholly contained in (the human body, flesh), enclosed within (an organ, a bodily member, etc.); in and filling (veins, internal regions of the body, etc.); also, incorporated in (the body)……