(statistics) A rival hypothesis to the null hypothesis. Their likelihoods are compared by a statistical hypothesis test.

Counterfactual history, a form of scientific speculation used by historians.

Used other than figuratively or idiomatically: see alternative, fact. / (politics, media) Something presented as a fact for reasons of political expediency; a fiction, a falsehood, a lie.

plural of alternative fact

(historical) A rotating machine for the generation of high-frequency alternating current, used in radio transmission.

plural of Alexanderson alternator

plural of alternative energy

plural of alternative medicine

plural of alternate universe

(linguistics) Verner alternation