what is xii
The noun XII has 1 sense: 1. the cardinal number that is the sum of eleven and one. Familiarity information: XII used as a noun is very rare. â¢ XII (adjective). The adjective XII has 1 sense: 1. denoting a quantity consisting of 12 items or units. Familiarity information: XII used as an adjective is very rare.he noun XII has 1 sense: 1. the cardinal number that is the sum of eleven and one. Familiarity information: XII used as a noun is very rare. â¢ XII (adjective). The adjective XII has 1 sense: 1. denoting a quantity consisting of 12 items or units. Familiarity information: XII used as an adjective is very rare.