The Collaborative International Dictionary of English v.0.48:

Meat \Meat\ (m[=e]t), n. [OE. mete, AS. mete; akin to OS. mat,
   meti, D. met hashed meat, G. mettwurst sausage, OHG. maz
   food, Icel. matr, Sw. mat, Dan. mad, Goth. mats. Cf. Mast
   fruit, Mush.]
   1. Food, in general; anything eaten for nourishment, either
      by man or beast. Hence, the edible part of anything; as,
      the meat of a lobster, a nut, or an egg. --Chaucer.
      [1913 Webster]

            And God said, Behold, I have given you every herb
            bearing seed, . . . to you it shall be for meat.
                                                  --Gen. i. 29.
      [1913 Webster]

            Every moving thing that liveth shall be meat for
            you.                                  --Gen. ix. 3.
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   2. The flesh of animals used as food; esp., animal muscle;
      as, a breakfast of bread and fruit without meat.
      [1913 Webster]

   3. Specifically: Dinner; the chief meal. [Obs.] --Chaucer.
      [1913 Webster]

   Meat biscuit. See under Biscuit.

   Meat earth (Mining), vegetable mold. --Raymond.

   Meat fly. (Zool.) See Flesh fly, under Flesh.

   Meat offering (Script.), an offering of food, esp. of a
      cake made of flour with salt and oil.

   To go to meat, to go to a meal. [Obs.]

   To sit at meat, to sit at the table in taking food.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Meat \Meat\, v. t.
   To supply with food. [Obs.] --Tusser.
   [1913 Webster]

         His shield well lined, his horses meated well.
                                                  --Chapman.
   [1913 Webster]

WordNet (r) 3.0 (2006):

meat
    n 1: the flesh of animals (including fishes and birds and
         snails) used as food
    2: the inner and usually edible part of a seed or grain or nut
       or fruit stone; "black walnut kernels are difficult to get
       out of the shell" [syn: kernel, meat]
    3: the choicest or most essential or most vital part of some
       idea or experience; "the gist of the prosecutor's argument";
       "the heart and soul of the Republican Party"; "the nub of the
       story" [syn: kernel, substance, core, center,
       centre, essence, gist, heart, heart and soul,
       inwardness, marrow, meat, nub, pith, sum, nitty-
       gritty]

Moby Thesaurus II by Grady Ward, 1.0:

320 Moby Thesaurus words for "meat":
   Brazil nut, TLC, act of love, adultery, almond, almond paste,
   amande, amande douce, amandes mondees, aphrodisia, aspic, ass,
   axiom, bag, balling, ballocks, balls, barbecue, basics, basis,
   basket, beard, bench mark, best part, better part, bitter almond,
   blanched almonds, board, body, boiled meat, bouilli, bread,
   bread and butter, breasts, bulk, burden, burnt almond,
   cardinal point, care, carnal knowledge, case, center, cervix,
   chapter, cheer, chief thing, chow, civet, climax, clitoris, cod,
   cods, cohabitation, coition, coitus, coitus interruptus,
   comestibles, commerce, concern, congress, connection, copula,
   copulation, core, cornerstone, coupling, creature comfort, crisis,
   critical point, crux, cuisine, cullions, daily bread, diddling,
   distillate, distillation, eatables, eats, economic support,
   edibles, elixir, endowment, entertainment, essence, essential,
   essential matter, essentials, fabric, family jewels, fare,
   fast food, feast, feed, female organs, flesh, flower, focus,
   focus of attention, focus of interest, food, food and drink,
   foodstuff, forcemeat, fornication, fundamental, game, generality,
   genitalia, genitals, gist, gonads, goober, goober pea, gravamen,
   great point, ground-pea, groundnut, grub, hachis, hash, head,
   heading, health food, heart, high point, hot number, hypostasis,
   important thing, ingesta, inner essence, intercourse, intimacy,
   issue, jerky, joint, jugged hare, junk food, keep, kernel,
   keystone, kitchen stuff, labia, labia majora, labia minora,
   landmark, lingam, lips, livelihood, living, living issue,
   lovemaking, main body, main point, main thing, maintenance,
   major part, majority, making it with, male organs, manna,
   marital relations, marriage act, marrow, mass, material,
   material point, mating, matter, matter in hand, meal, medium,
   menue viande, mess, milestone, mince, most, mothering, motif,
   motive, nigger toe, noisette, noix, nourishment, nub, nucleus,
   nurture, nut, nutriment, nuts, nuts and bolts, nymphae, onanism,
   orgasm, ovary, ovum, pareunia, peanut, peanut butter, pemmican,
   penis, phallus, piece, piece of ass, piece of meat, pith, pivot,
   plurality, point, point at issue, point in question, postulate,
   pot roast, price support, principle, private parts, privates,
   privy parts, problem, procreation, provender, provision,
   provisions, pubic hair, pudenda, question, quid, quiddity,
   quintessence, real issue, recap, recapitulation, refection,
   refreshment, regalement, relations, repas, repast,
   reproductive organs, resume, roast, rocks, rubric, run-through,
   rundown, salient point, salted peanuts, sap, sausage meat,
   scrapple, screwing, scrotum, secondary sex characteristic, sense,
   sex, sex act, sex goddess, sex object, sex organs, sex queen,
   sexual climax, sexual commerce, sexual congress,
   sexual intercourse, sexual relations, sexual union, short,
   sine qua non, sleeping with, soul, sperm, spermary, spirit, spread,
   stud, stuff, subject, subject matter, subject of thought,
   subsidization, subsidy, subsistence, substance, substantive point,
   subvention, sum, sum and substance, summary, summation, support,
   sustainment, sustenance, sustentation, sweet almond, table,
   tender loving care, testes, testicles, text, the bottom line,
   the nitty-gritty, the point, theme, thrust, topic, treat, tucker,
   turning point, upkeep, upshot, uterus, vagina, venery, venison,
   viande, viands, victuals, vittles, vulva, womb, yoni