false meaning, definition, and synonyms

False is a versatile adjective and, in one older adverbial use, a word meaning untrue or not real in several different ways. It can describe something deceptive, incorrect, imitation, off-pitch, or disloyal depending on the context.

Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.

Pronunciation

AI-generated pronunciation audio (OpenAI).

Accent: General American English

IPA: /fɔls/

Easy pronunciation: FALSE (approximate spelling).

Stress: One syllable, so the single syllable is stressed.

Primary sense: adjective meaning not in accordance with fact or reality; not true or incorrect.

Reviewed with OpenAI Decisions. Assessment: uncertain — manual review needed. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.

False Meaning

not true; incorrect

Part of speech: adjective

Definition: not in accordance with fact or reality

Example: The report turned out to be false.

Synonyms for this meaning:

untrue — The closest general substitute for statements, claims, or reports that are not true.

Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.

Other Meanings of False

Meaning 2

made to look or seem real in order to trick someone

Part of speech: adjective

Definition: adopted in order to deceive

Example: He wore a false beard.

Synonyms for this meaning:

assumed — Can mean taken on as a disguise or role, but it is less direct than most substitutes.
fictitious — Can suggest something invented or made up, though it is broader than simple disguise.
fictive — Possible in formal or literary contexts, but not a common everyday substitute.
pretended — Works when something is deliberately made to seem real.
put on — Works for a look, manner, or performance that is not genuine.
sham — A strong fit for something fake or not genuine, especially when meant to mislead.

Meaning 3

not real; made to copy the real thing

Part of speech: adjective

Definition: not genuine or real; being an imitation of the genuine article

Example: She had false teeth.

Synonyms for this meaning:

fake — A strong everyday substitute for something not genuine.
faux — Common for imitation materials or styles.
imitation — Works well for an object made to copy the real thing.
simulated — Fits when something is artificially produced to resemble the real thing.

Meaning 4

wrong because of a mistake

Part of speech: adjective

Definition: arising from error

Example: That was a false assumption.

Synonyms for this meaning:

mistaken — A natural substitute when something is wrong because of an error.

Meaning 5

not loyal; betraying trust

Part of speech: adjective

Definition: (used especially of persons) not dependable in devotion or affection; unfaithful

Example: She felt hurt by his false friend.

Synonyms for this meaning:

untrue — Can mean disloyal or faithless in older or more literary usage, but it is not the clearest everyday substitute.

Meaning 6

not matching the facts; unreal or misleading

Part of speech: adjective

Definition: inappropriate to reality or facts

Example: The movie gave people false hopes.

Synonyms for this meaning:

delusive — Suggests misleading or illusory, but it is formal and narrower in use.

Meaning 7

in a traitorous or unfaithful way

Part of speech: adverb

Definition: in a disloyal and faithless manner

Example: He played his allies false.

Synonyms for this meaning:

faithlessly — Directly matches the adverbial sense.
traitorously — Strong fit when the meaning is betrayal.
treacherously — Works well for betrayal or deceptive disloyalty.
treasonably — Fits mainly in political or legal betrayal contexts.

Meaning 8

made to trick someone

Part of speech: adjective

Definition: designed to deceive

Example: The chest had a false bottom.

Meaning 9

wrong by mistake

Part of speech: adjective

Definition: erroneous and usually accidental

Example: The race began with a false start.

Meaning 10

out of tune

Part of speech: adjective

Definition: inaccurate in pitch

Example: The singer hit a false note.

Synonyms for this meaning:

off-key — A direct everyday substitute for music or singing.
sour — Works for notes or sounds, but is less common than off-key.

Reviewed with OpenAI Decisions. Assessment: inaccurate — correction needed. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.

False Synonyms

Similar Meaning

untrue

deceptive or not genuine

fake
faux
imitation
pretended
sham

wrong because of error

mistaken

off-pitch

off-key
sour

disloyal or faithless

faithlessly
traitorously
treacherously
treasonably

Reviewed with OpenAI Decisions. Assessment: inaccurate — correction needed. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.

Common Mistakes

Do not use false for every meaning of 'fake'; some senses mean simply 'wrong' or 'untrue'.
False friend does not mean a friend who is 'fake' in every sense; it usually means a disloyal or unreliable friend.
In music, false means off-key, not 'incorrect' in a general sense.

Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.

Frequently Asked Questions

What is the basic meaning of false?

Its core meaning is 'not true' or 'not in line with reality.'

What is a simple synonym for false?

Untrue is the safest general synonym for the main meaning.

Does false always mean fake?

No. It can also mean mistaken, misleading, off-key, or disloyal, depending on the context.

What does false mean in false alarm or false start?

It means wrong or accidental, not intentional deception.

Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-17. AI assessment; not a guarantee of accuracy.