Adjective

(en adjective)

Seemingly or apparently valid, likely, or acceptable; credible: a plausible excuse.

*

In short, the twin assumptions that syntactic rules are category-based, and that there are a highly restricted finite set of categories in any natural language (perhaps no more than a dozen major categories), together with the assumption that the child either knows'' (innately) or ''learns (by experience) that all rules are structure-dependent ( =category-based), provide a highly plausible model of language acquisition, in which languages become learnable in a relatively short, finite period of time (a few years).

Obtaining approbation; specifically pleasing; apparently right; specious.

a plausible''' pretext; '''plausible''' manners; a '''plausible delusion

Using specious arguments or discourse. (rfv-sense)

a plausible speaker

(obsolete) Worthy of being applauded; praiseworthy; commendable; ready.

(Bishop Hacket)

Adjective

(en adjective)

Subject to, or causing doubt

or showing doubt, sceptical

Undecided or of uncertain outcome

(obsolete) Fearsome, dreadful.

*, Bk.XIV, Ch.vii:

*:‘With whom,’ seyde Sir Percivale, ‘shall I fyght?’ ‘With the moste douteful champion of the worlde.’

Improbable or unlikely

Suspicious, or of dubious character

Unclear or unreliable

*{{quote-book, year=1922, author=E.R. Eddison, title=The Worm Ouroboros

, passage=The pupils of her great eyes were large in the doubtful lamplight, swallowing their green fires in deep pools of mystery and darkness.}}