Within a book, all content preceding the main text or work itself.

(chemistry) Either of a pair of orbitals, of two molecules or fragments, that overlap to form a bond; especially the HOMO and LUMO orbitals

plural of frontal sinus

(idiomatic) Something non-existent; something of no value or cost.

(humorous, rare) ice cream

plural of front organization

plural of front group

A front organization that appears to be an independent voluntary association or charitable organization.

(figuratively) To disapprove of (something or someone, often a behavior); to express disapproval of (something or someone).

Alternative spelling of full frontal nudity