lox UK /lɒks/US /lɑks/noun 2verb 1forms 3 noun2 •(US) Salmon that is cured in brine and then smoked at a low temperature so that the flesh remains uncooked. •Acronym of liquid oxygen, molecular oxygen in liquid form.[Man]: Lox tanking secured? / [Man 2]: Lox tanking secured. — 1959 verb1 •To supply with liquid oxygen.Fumes coming from the booster at the pad indicate that loxing has begun -- that is, the liquid oxygen has begun to be poured into its tank aboard the Atlas. — 2002 formsloxed · loxing · loxes