The Collaborative International Dictionary of English v.0.48:

Clinch \Clinch\ (kl[i^]nch; 224), v. t. [imp. & p. p.
   Clinched; p. pr. & vb. n. Clinching.] [OE. clenchen,
   prop. causative of clink to cause to clink, to strike; cf. D.
   klinken to tinkle, rivet. See Clink.]
   1. To hold firmly; to hold fast by grasping or embracing
      tightly. "Clinch the pointed spear." --Dryden.
      [1913 Webster]

   2. To set closely together; to close tightly; as, to clinch
      the teeth or the first. --Swift.
      [1913 Webster]

   3. To bend or turn over the point of (something that has been
      driven through an object), so that it will hold fast; as,
      to clinch a nail.
      [1913 Webster]

   4. To make conclusive; to confirm; to establish; as, to
      clinch an argument. --South.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Clinch \Clinch\, v. i.
   To hold fast; to grasp something firmly; to seize or grasp
   one another.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Clinch \Clinch\ (kl[i^]nch), n.
   1. The act or process of holding fast; that which serves to
      hold fast; a grip; a grasp; a clamp; a holdfast; as, to
      get a good clinch of an antagonist, or of a weapon; to
      secure anything by a clinch.
      [1913 Webster]

   2. A pun. --Pope.
      [1913 Webster]

   3. (Naut.) A hitch or bend by which a rope is made fast to
      the ring of an anchor, or the breeching of a ship's gun to
      the ringbolts.
      [1913 Webster]

WordNet (r) 3.0 (2006):

clinch
    n 1: (boxing) the act of one boxer holding onto the other to
         avoid being hit and to rest momentarily
    2: a small slip noose made with seizing [syn: clinch,
       clench]
    3: the flattened part of a nail or bolt or rivet
    4: a device (generally used by carpenters) that holds things
       firmly together [syn: clamp, clinch]
    5: a tight or amorous embrace; "come here and give me a big hug"
       [syn: hug, clinch, squeeze]
    v 1: secure or fasten by flattening the ends of nails or bolts;
         "The girder was clinched into the wall"
    2: hold a boxing opponent with one or both arms so as to prevent
       punches
    3: hold in a tight grasp; "clench a steering wheel" [syn:
       clench, clinch]
    4: embrace amorously
    5: flatten the ends (of nails and rivets); "the nails were
       clinched"
    6: settle conclusively; "clinch a deal"

Moby Thesaurus II by Grady Ward, 1.0:

189 Moby Thesaurus words for "clinch":
   abduct, adhere, adhere to, affix, afford proof of, agglomerate,
   anchor, ankle, annex, articulation, ascertain, assure, attach,
   bear hug, belay, bite, boundary, bring home to, bunch, butt,
   carry off, cement, certify, cervix, cinch, clamp, clasp, clear up,
   cleave, cleave to, clench, cling, cling to, clinging, clip,
   close quarters, closure, clot, cluster, clutch, coagulate, cohere,
   come together, communicate, complete, conclude, confirm, congeal,
   conglomerate, connect, connecting link, connecting rod, connection,
   converge, coupling, cramp, cuddle, death grip, decide, demonstrate,
   determine, dismiss all doubt, dispose of, dovetail, elbow, embrace,
   enfold, engraft, ensure, establish, fasten, find out, firm hold,
   fix, follow, follow from, foothold, footing, freeze to, get at,
   gliding joint, graft, grapple, grasp, grip, gripe, grow together,
   hang on, hang on to, hang together, have a case, hinge,
   hinged joint, hip, hold, hold fast, hold good, hold on, hold on to,
   hold tight, hold together, hold water, hug, insure,
   intercommunicate, interface, iron grip, join, joining, joint,
   juncture, keep hold of, kidnap, knee, knit, knuckle, link,
   make certain, make fast, make good, make no doubt, make no mistake,
   make out, make sure, make sure of, mass, meet, merge, miter, moor,
   mortise, nail down, neck, never let go, nip, persist, pivot,
   pivot joint, press, prove, prove to be, prove true, purchase,
   put to, rabbet, reassure, remove all doubt, scarf, screw up, seam,
   secure, see that, see to it, seizure, set, set at rest, set to,
   settle, settle the matter, shanghai, shoulder, show, solidify,
   sort out, squeeze, stay, stay put, stick, stick to, stick together,
   stitch, suture, symphysis, take hold of, tenure, throttle, tie rod,
   tight grip, tighten, toehold, toggle, toggle joint, trice up, trim,
   union, unite, weld, wind up, wrist



U.S. Gazetteer Counties (2000):

Clinch -- U.S. County in Georgia
   Population (2000):    6878
   Housing Units (2000): 2837
   Land area (2000):     809.287995 sq. miles (2096.046195 sq. km)
   Water area (2000):    14.884630 sq. miles (38.551013 sq. km)
   Total area (2000):    824.172625 sq. miles (2134.597208 sq. km)
   Located within:       Georgia (GA), FIPS 13
   Location:             30.945683 N, 82.716673 W
   Headwords:
    Clinch
    Clinch, GA
    Clinch County
    Clinch County, GA