1. < mathematics > One instance of some mathematical object contained with in another instance, e.g. a group which is a subgroup.
2. ( domain theory ) A complete partial order F in [X -> Y] is an embedding if
(1) For all x1, x2 in X, x1 F x1 (2) For all y in Y, x | F x is directed .
(" LaTeX as \sqsubseteq ).
(1995-03-27)