(politics) A political system in which voters are given the choice between two parties.

In a very short time.

(advertising) An agency's fee of 15% commission on the gross charge for advertising space and time, minus 2% of the net amount as a discount for prompt payment.

Having two prongs or similar parts; bifurcated.

(informal, humorous) The decade that began on January 1, 2000 and ended on December 31, 2009.

(UK, slang, obsolete) The pawnbroker's sign of three balls.

(Canada, Philippines) Second grade.

(Philippines) The second year of kindergarten, the period in school that comes after nursery and before prep or elementary.

The quality of being two-faced.

(nautical) Having two masts.