Webster's Revised Unabridged Dictionary · 1913

Passable

Passable , adjective

[Compare French passable.]

1.
Capable of being passed, traveled, navigated, traversed, penetrated, or the like; as, the roads are not passable; the stream is passablein boats.
His body's a passable carcass if it be not hurt; it is a throughfare for steel. — Shakespeare
2.
Capable of being freely circulated or disseminated; acceptable; generally receivable; current.
With men as with false money -- one piece is more or less passable than another. — L'Estrange
Could they have made this slander passable. — Collier
3.
Such as may be accepted or allowed to pass without serious objection; adequate; acceptable; tolerable; admissable; moderate; mediocre.
My version will appear a passable beauty when the original muse is absent. — Dryden