Adjective

(en adjective)

Done or kept in secret, sometimes to conceal an illicit or improper purpose.

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* 2004 — (Penny Arcade)

In my imagination, all work place encounters between men and women result in clandestine sex.

* 2005 — (Stewart Lee), 90's Comedian DVD''

And I don't want anyone to think I dislike Catholicism because I don't. It's actually my favourite form of clandestine global evil.

(freemasonry, of a person or lodge) Not recognized as a regular member.

Adjective

(er)

Untrue, not factual, factually incorrect.

*{{quote-book, year=1551, year_published=1888

, title= A New English Dictionary on Historical Principles: Founded Mainly on the Materials Collected by the Philological Society , section=Part 1, publisher=Clarendon Press, location=Oxford, editor= , volume=1, page=217 , passage=Also the rule of false position, with dyuers examples not onely vulgar, but some appertaynyng to the rule of Algeber.}}

Based on factually incorrect premises: false legislation

Spurious, artificial.

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*:At her invitation he outlined for her the succeeding chapters with terse military accuracy?; and what she liked best and best understood was avoidance of that false modesty which condescends, turning technicality into pabulum.

(lb) Of a state in Boolean logic that indicates a negative result.

Uttering falsehood; dishonest or deceitful.

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

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*(John Milton) (1608-1674)

*:I to myself was false , ere thou to me.

Not well founded; not firm or trustworthy; erroneous.

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*(Edmund Spenser) (c.1552–1599)

*:whose false foundation waves have swept away

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

(lb) Out of tune.