Webster's Revised Unabridged Dictionary · 1913

Plein

Plein , adjective

Plan. [Obsolete] — Chaucer

Plein , verb, intransitive and transitive

To complain. See Plain. [Obsolete]

Plein , adjective

[Old French & French, from Latin plenus.]

Full; complete. [Obsolete]
Plein remission. — Chaucer