/three"fohld'/ , adj.
1. comprising three parts, members, or aspects; triple: a threefold program.
2. three times as great or as much; treble: a threefold return on an investment.
adv.
3. in threefold manner or measure; trebly.
[ bef. 1000; ME threfold, OE thrifeald. See THREE, -FOLD ]