One of two options on a true-or-false test, that not representing true.

(electronics, telecommunications, of a decoder) To incorrectly decode noise as if it were a valid signal.

(obsolete) To violate, to betray (a promise, an agreement, one’s faith, etc.).

(obsolete) To counterfeit, to forge.

(obsolete) To make false, to corrupt from something true or real.

Untrue, not factual, factually incorrect.

Based on factually incorrect premises.

Spurious, artificial.

Uttering falsehood; dishonest or deceitful.

Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous.

Not well founded; not firm or trustworthy; erroneous.

Not essential or permanent, as parts of a structure which are temporary or supplemental.

Used in the vernacular name of a species (or group of species) together with the name of another species to which it is similar in appearance.

(music) Out of tune.

In a dishonest and disloyal way; falsely.