Twain (?), a. & n. [OE. twein,
tweien, tweyne, AS. twēgen, masc. See
Two.] Two; -- nearly obsolete in common discourse, but used in
poetry and burlesque. "Children twain." Chaucer.
And whosoever shall compel thee to go a mile, go with him
twain.
Matt. v. 41.
In twain, in halves; into two parts;
asunder.
When old winder split the rocks in
twain.
Dryden.
-- Twain cloud. (Meteor.) Same as
Cumulo-stratus.