Pronunciation: (bi-hīnd'),[key] —prep. 1. at or toward the rear of: Look behind the house. 2. not keeping up with, later than; after: behind schedule. 3. in the state of making less progress than: We can't afford to fall behind our competitors. 4. on the farther side of; beyond: behind the mountain. 5. originating, supporting, or promoting: Who's behind this program? 6. hidden or unrevealed by: Malice lay behind her smile. 7. at the controls of: behind the wheel of a car.
—adv. 1. at or toward the rear; rearward: to lag behind. 2. in a place, state, or stage already passed.
3. in arrears; behindhand: to be behind in one's rent. 4. slow, as a watch or clock: more than 20 minutes behind. 5. as a cause or often latent feature of: Behind their harassment lay the traditional fear of foreigners. 6. in a situation that exists afterward: The victim left behind a large family. 7. Archaic.in reserve; to come: Greater support is yet behind.