op•po•siteˈɒp ə zɪt, -sɪt(adj.)

1. situated or lying face to face with something else or each other, or placed in corresponding positions across an intervening line, space, etc.:

   at opposite ends of a room.

2. contrary or radically different, as in nature, qualities, or significance; opposed:

   opposite sides in a controversy.

3. being the other of two related or corresponding things:

   the opposite sex.

   Category: Common Vocabulary

4. Bot. situated on diametrically opposed sides of a stem, as leaves occurring in pairs at a node.

   Category: Botany

5. adverse or inimical.

6. (n.)a person or thing that is opposite or contrary.

7. Ref: antonym

8. (prep.)across from; facing:

   to sit opposite the fireplace.

9. in a role parallel or complementary to.

10. (adv.)on or to the opposite side:

    I was at one end and she sat opposite.

Origin of opposite:

1350–1400; < MF < L oppositus, ptp. of oppōnere to set against

op′po•site•ness(n.)