turn - verb

1. To move or cause to move in circles or around an axis: circle, circumvolve, gyrate, orbit, revolve, rotate, wheel. See move. repetition.
2. To spade or dig (soil) to bring the undersoil to the surface: plough, turn over. See move.
3. To make or become less sharp-edged: blunt, dull. See sharp.
4. To twist and turn, as in pain, struggle, or embarrassment: agonize, squirm, toss, writhe. See repetition.
5. To injure a (bodily part) by twisting: sprain, wrench. See health.
6. To disturb the health or physiological functioning of: derange, disorder, unsettle, upset. See health.
7. To change the direction or course of: avert, deflect, deviate, divert, pivot, shift, swing, veer. See change.
8. To cause to move, especially at an angle: angle, bend, deflect, refract. See straight.
9. To swerve from a straight line: angle, arc, arch, bend, bow, crook, curve, round. See straight.
10. To change to the opposite position, direction, or course. invert, reverse, transpose. See change.
11. To make or become different: alter, change, modify, mutate, vary. See change.
12. To abandon one's cause or party usually to join another: apostatize, defect, desert, rat, renegade, tergiversate. See approach. trust.
13. To move (a weapon or blow, for example) in the direction of someone or something: aim, cast, direct, head, level, point, set, train, zero in. See seek.
14. To devote (oneself or one's efforts): address, apply, bend, buckle down, concentrate, dedicate, devote, direct, focus, give. See collect. work.
15. To become or cause to become rotten or unsound: break down, decay, decompose, deteriorate, disintegrate, moulder, putrefy, rot, spoil, taint. See better. thrive.
16. To look to when in need: apply, go, refer, repair, resort, run. See used.
17. To come to be. become, come, get, grow, wax. See change.

turn down - phrasal verb

1. To be unwilling to accept, consider, or receive: decline, dismiss, refuse, reject, spurn. Slang nix. See accept.
2. To be unwilling to grant: deny, disallow, refuse, withhold. See accept.
3. To prevent or forbid authoritatively: blackball, negative, veto. Slang nix. See accept.

turn in - phrasal verb

1. To commit to the consideration or judgement of another: submit. See give.
2. To go to bed: bed(down). North American flop. See awareness.

turn off - phrasal verb

1. To be very disagreeable to: displease. See like. pain.

turn on - phrasal verb

1. To be determined by or contingent on something unknown, uncertain, or changeable: depend on, hang on, hang upon, hinge on or upon, rest on or upon, turn upon. See start.
2. To arouse the interest and attention of: attract, interest, intrigue. See excite.

turn out - phrasal verb

1. To supply what is needed for some activity or purpose: accoutre, appoint, equip, fit, fit out or up, furnish, gear, outfit, rig. See give.
2. To leave one's bed: arise, get up, rise, roll out. See rise.

turn over - phrasal verb

1. To spade or dig (soil) to bring the undersoil to the surface: plough, turn. See move.
2. To turn or cause to turn from a vertical or horizontal position: capsize, knock over, overthrow, overturn, topple, upset. See change. horizontal. move.
3. To think or think about carefully and at length: chew over, cogitate, consider, contemplate, deliberate, entertain, excogitate, meditate, mull, muse, ponder, reflect, revolve, ruminate, study, think, think out, think over, think through, weigh. See thoughts.
4. To relinquish to the possession or control of another: deliver, furnish, give, hand, hand over, provide, supply, transfer. See give.
5. To put in the charge of another for care, use, or performance: commend, commit, confide, consign, entrust, give(over), hand over, relegate, trust. See give.
6. To direct (a person) elsewhere for help or information: refer, send, transfer. See move.

turn up - phrasal verb

1. To find by investigation: dig(out or up), uncover, unearth. See show.
2. To come to a particular place: arrive, blow in, check in, get in, pull in, reach, show up. Informal swan in or up. See start.

turn upon - phrasal verb

1. To be determined by or contingent on something unknown, uncertain, or changeable: depend on, hang on, hang upon, hinge on or upon, rest on or upon, turn on. See start.

turn - noun

1. Circular movement around a point or about an axis: circuit, circulation, circumvolution, gyration, revolution, rotation, wheel, whirl. See geometry. repetition.
2. A calculated change in position: evolution, manoeuvre, move, movement. See move.
3. Something bent: bend, bow, crook, curvature, curve, round. See straight.
4. An often sudden change or departure, as in a trend: shift, tack, twist. See change.
5. A limited, often assigned period of activity, duty, or opportunity: bout, shift, spell, stint, stretch, time, tour, trick, watch. Informal go. See time.
6. An inclination to something: bent, bias, cast, disposition, leaning, partiality, penchant, predilection, predisposition, proclivity, proneness, propensity, squint, tendency, trend. See approach. like.
7. An innate capability: aptitude, aptness, bent, faculty, flair, genius, gift, head, instinct, knack, talent. See ability. approach.
8. A course, process, or journey that ends where it began or repeats itself: circle, circuit, cycle, orbit, round, tour. See repetition.
9. A usually brief and regular journey on foot, especially for exercise: constitutional, walk. See move.