The Collaborative International Dictionary of English v.0.48:

Grill \Grill\, n. [F. gril. See Grill, v. t.]
   1. A gridiron.
      [1913 Webster]

            [They] make grills of [wood] to broil their meat.
                                                  --Cotton.
      [1913 Webster]

   2. That which is broiled on a gridiron, as meat, fish, etc.
      [1913 Webster]

   3. A figure of crossed bars with interstices, such as those
      sometimes impressed upon postage stamps.
      [Webster 1913 Suppl.]

   4. A grillroom.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Grill \Grill\, v. t. [imp. & p. p. Grilled; p. pr. & vb. n.
   Grilling.] [F. griller, fr. gril gridiron, OF. gra["i]l, L.
   craticulum for craticula fine hurdlework, a small gridiron,
   dim. of crates hurdle. See Grate, n.]
   [1913 Webster]
   1. To broil on a grill or gridiron.
      [1913 Webster]

            Boiling of men in caldrons, grilling them on
            gridirons.                            --Marvell.

   2. To torment, as if by broiling. --Dickens.
      [1913 Webster]

   3. To stamp or mark with a grill.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Grill \Grill\, v. i.
   To undergo the process of being grilled, or broiled; to
   broil.

         He had grilled in the heat, sweated in the rains.
                                                  --Kipling.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

grill
    n 1: a restaurant where food is cooked on a grill [syn:
         grillroom, grill]
    2: a framework of metal bars used as a partition or a grate; "he
       cooked hamburgers on the grill" [syn: grill, grille,
       grillwork]
    v 1: cook over a grill; "grill the sausages"
    2: examine thoroughly; "the student was grilled for two hours on
       the subject of phonology"

Moby Thesaurus II by Grady Ward, 1.0:

135 Moby Thesaurus words for "grill":
   andiron, automat, bake, barbecue, baste, beanery, bistro, blanch,
   boil, braise, brew, broil, brown, buffet, buvette, cafe, cafeteria,
   canteen, cantina, casserole, chain, chophouse, chuck wagon,
   coal tongs, coddle, coffee shop, coffeehouse, coffeeroom, cook,
   cookhouse, cookshack, cookshop, course, cover, crane, crook,
   cross-examine, cross-interrogate, cross-question,
   culinary masterpiece, culinary preparation, curry, damper, devil,
   diner, dining hall, dining room, dish, dismember, do,
   do to perfection, dog wagon, draw and quarter, drive-in,
   drive-in restaurant, eatery, eating house, entree,
   extract information, fast-food chain, fire, fire hook, fire tongs,
   firedog, fricassee, frizz, frizzle, fry, go over, grate, grating,
   grid, griddle, gridiron, griller, grillroom, hamburger stand,
   hash house, hashery, heat, hot-dog stand, impale, inquisition,
   interrogation, keelhaul, kitchen, lifter, lunch counter,
   lunch wagon, luncheonette, lunchroom, main dish, make inquisition,
   mess hall, oven-bake, pan, pan-broil, parboil, picket, pizzeria,
   poach, poker, pothook, prepare, prepare food, pry out,
   quick-lunch counter, rack, restaurant, roast, salamander, saute,
   scallop, sear, shirr, side dish, simmer, smorgasbord, snack bar,
   spit, steam, stew, stir-fry, tar and feather, tavern, tearoom,
   third degree, third-degree, toast, tongs, torture, trattoria,
   tripod, trivet, turnspit