1. (a.) Double; duplicate; multiplied by two; as, a twofold nature; a twofold sense; a twofold argument.

2. (adv.) In a double degree; doubly.

Janus-like ambidextrous as much again bifacial bifold biform bilateral binary binate biparous bivalent conduplicate disomatous double double-barreled double-faced doubly dual dualistic dually duple duplex duplicate dyadic geminate geminated paired second secondary twice twice as much twice over twin twinned two times two-faced two-level two-ply two-sided two-story