(Indo-European studies) The alternation between consonants in different forms of a word stem in the Germanic languages, as a result of Verner's law.

(biology) metagenesis

plural of alternative universe

Alternative rock.

The alt-left.

The alt-right.

(law) a legal doctrine that allows a plaintiff to shift the burden of proving causation of her injury to multiple defendants, even though only one of them could have been responsible

The plumage that some birds adopt for courtship and breeding

(music) A genre of pop music, usually produced by underground performers, characterized by an eclectic range of influences and musically challenging arrangements.

(US) Alternative spelling of alternative energy