outplant verb 2noun 1forms 3 verb2 •To plant outdoors (after rearing in a greenhouse etc.). •To surpass in plantingHis father bragged that his son could outplant any laborer available for hire in the village. — 1982 noun[in the plural]1 •A gel-like prosthesis placed inside the cup of a bra (outside the breast) to enhance apparent breast size.[…] breast outplants to teenage hypochondria. — 1996 formsoutplanted · outplanting · outplants