Esp. of speech or words: ostensibly pleasant or attractive, but intended to deceive or to conceal an ulterior motive; specious; insincere, flattering.

Apparent to the senses or to the mind, as distinct from what is.

Of persons, their manner, faces, etc.: Made up to a certain appearance, got up for a purpose; hence, deceitful, insincere. Obsolete.

Having an appearance of truth or trustworthiness; plausible; reasonable; (esp. in early use) specious. Now rare.

Esp. of words: calculated to make a favourable impression; plausible; specious. Obsolete (Scottish in later use).

Of a fact, argument, etc.: presented or manipulated so as to appear true or trustworthy; valid in appearance only; specious. Cf. colourable, adj. 1a…

Satisfying; satisfactory, acceptable, agreeable. Cf. satisfiable, adj. 1. Obsolete.

Worthy of acceptance or belief, plausible; = probable, adj. 1. Obsolete.

Of pretences, pretexts, etc.

That appears to be good or well-intentioned.

That has only the outward appearance of being what is denoted by the noun; appearing to be true or real only until examined more closely.

Alluring by false show; showily or superficially attractive but having in reality no value or integrity.

Of immaterial things: Wearing an outside show, made to look specious.

That commends itself to the mind; worthy of acceptance or belief, acceptable, believable. Occasionally in negative sense: plausible, specious. Now…

Superficially resembling or simulating, but lacking the genuine character or qualities of, something… Of qualities, conditions, etc.

Of the nature of ‘fucation’, fair-seeming, specious, deceitful.

Declared, avowed, professed; presented (esp. untruthfully or misleadingly) as actual; stated or appearing to be genuine, but not necessarily so…

figurative. Of an idea: attractive, specious. Obsolete. rare.

Seeming, apparent, counterfeit.