thick

1 having or being of relatively great depth or extent from one surface to its opposite a thick board was laid across the pit Synonyms chunky, fat Related Words blockish, blocky, bulky, dense, hefty, thickish; broad, deep, wide Near Antonyms narrow, shallow Antonyms skinny, slender, slim, thin

2 being of a consistency that resists flow thick maple syrup for pancakes Synonyms ropy (also ropey), syrupy, viscid, viscous Related Words creamy, heavy, slushy, thickened, thickish, turbid, undiluted; semifluid, semiliquid; gluey, glutinous, sticky; gelatinous, gooey, gummy, jellylike; concentrated, condensed Near Antonyms flowing, fluid; dilute, diluted, liquid, watered-down, weak Antonyms runny, soupy, thin, watery

3 closely acquainted those two have been thick since grade school Synonyms bosom, buddy-buddy, chummy, close, especial, friendly, inseparable, intimate, inward, near, familiar, tightRelated Words clannish, close-knit, tight-knit; affable, boon, companionable, convivial, cordial, genial, gracious, hearty; gregarious, sociable, social; comfortable, cozy, easy, snug; amicable, neighborly; confidential, secretive; adoring, affectionate, dear, devoted, fond, loving, tender, tenderhearted, warmNear Antonyms aloof, antisocial, cold, cool, detached, distant, frosty, remote, reserved, standoffish, unfriendly, unsociable, withdrawnAntonyms distant

4 having a greater than usual measure across cross your name off the list with a really thick line so I can see it Synonyms broad, fat, wideRelated Words expansive, extensive, sweeping; commodious, roomy, spacious; outsize (also outsized), oversize (or oversized), sizable (or sizeable), substantial, tidy, voluminousNear Antonyms fine, hairlike, reedlike; elongate (or elongated), needlelike; bottleneck, close, compressed, condensed, constricted, contracted, squeezed, tight, tightened; attenuate, attenuated; small, smallish, undersized (also undersize)Antonyms hairline, narrow, paper-thin, skinny, slender, slim, slim-jim, thin

5 having little space between items or parts a hedge thick with gorse bushes Synonyms compact, crowded, dense, jam-packed, packed, serried, close, tightRelated Words crammed, jammed, overcrowded; crushed, massed, pressed, squeezed, wall-to-wall; airtight, snug; compacted, compressed, condensed, congested; firm, hard, solid; impenetrable, impermeable, imperviousNear Antonyms commodious, roomy, spaciousAntonyms airy, loose, open, uncrowded

6 not having or showing an ability to absorb ideas readily couldn't believe that his guests were so thick that they were missing his hints that it was time to leave Synonyms airheaded, birdbrained, bonehead, boneheaded, brain-dead, brainless, bubbleheaded, chuckleheaded, dense, dim, dim-witted, doltish, dopey (also dopy), dorky [slang], dull, dumb, dunderheaded, empty-headed, fatuous, gormless [chiefly British], half-witted, knuckleheaded, lamebrain (or lamebrained), lunkheaded, mindless, oafish, obtuse, opaque, pinheaded, senseless, simple, slow, slow-witted, soft, softheaded, stupid, thickheaded, thick-witted, unintelligent, unsmart, vacuous, weak-minded, witlessRelated Words cretinous, feebleminded, simpleminded; boobish, foolish, idiotic (also idiotical), imbecile (or imbecilic), moronic; ignorant, illiterate, lowbrow, uneducated, uninformed, unintellectual, untaught, unthinking; absurd, asinine, balmy, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, featherheaded, fool, half-baked, harebrained, insane, kooky (also kookie), loony (also looney), lunatic, mad, nonsensical, nutty, preposterous, sappy, screwball, silly, tomfool, unwise, wacky (also whacky), zany; fallacious, illogical, invalid, irrational, unreasonableNear Antonyms ingenious, resourceful; acute, astute, discerning, insightful, keen, knowing, perceptive, percipient, perspicacious, sagacious, sage, sapient, savvy, wise; cerebral, erudite, highbrow, intellectual, knowledgeable, learned, literate, scholarly, thinking, well-read; educated, informed, schooled, skilled, trained; crafty, cunning, foxy, shrewd, wily; judicious, prudent, sane, sensible, sound; logical, rational, reasonable, validAntonyms apt, brainy, bright, brilliant, clever, fast, hyperintelligent, intelligent, keen, nimble, quick, quick-witted, sharp, sharp-witted, smart, supersmart, ultrasmart

7 possessing or covered with great numbers or amounts of something specified a meadow thick with wildflowers Synonyms abounding, abundant, awash, flush, fraught, lousy, replete, swarming, teeming, rife, throngingRelated Words brimming, bulging, bursting, chock-full (or chockful), crammed, crowded, fat, filled, full, jammed, jam-packed, loaded, packed, saturated, stuffed; clogged, congested, overcrowded, overfilled, overflowing, overfull, overladen, overloaded, overstuffed, surfeited; alive, animated, astir, bustling, busy, buzzing, humming, livelyNear Antonyms bare, barren, blank, devoid, empty, stark, vacant, void; depleted, drained, exhausted; deficient, incomplete, insufficient, short