(a) To duplicate (sth.); ~ wive, take two or more wives; doubled, paired; (b) to consist of two different kinds or colors; ~ on brede, spread out in two directions; (c) to 'second' (a song), join in.

(a) To become twice as great; ~ an hundred-fold, increase a hundredfold; ~ in noumbre, be twice as numerous as (sth.); (b) to make (sth.) twice as great, strong, numerous, etc.; ~ daies, double the number of days; ~ an hundredfold, increase (sth.) a hundredfold; ~ the dai, make the day twice as long for (sb.); ~ thrice, treble (sth.); (c) to do (sth.) twice or repeatedly; (d) math. to multiply by two; doubled, as noun: a number which has been doubled.

(a) To fold (sth.) so as to make it double; line (a garment); (b) to bend (a knee or arm); of an eyelid: fold under; ~ aboute, curl around (sth.).