Liber, the god of Roman mythology associated with the Greek god Dionysus

In real estate, the book in which a subdivision plat is recorded

Phloem, in botany, for which liber is another name

It also means free (as in freedom and unbounded) in Latin and Romanian (libero in Italian).

The Latin root for many English words referring to freedom (see above), such as libertarian, liberal, liberty, Liberia ("free land"), and liberation.