generated at
thick

adjective
1. with opposite sides or surfaces that are a great or relatively great distance apart:
〈物が〉(分)厚い, 厚みのある(↔ thin)
e.g. thick slices of bread
e.g. thick metal cables
e.g. the walls are 5 feet thick.
(of a garment or other knitted or woven item) made of heavy material for warmth or comfort:
e.g. a thick sweater.
(of script or type) consisting of broad lines:
〈文字・線が〉肉太の(↔ thin)
e.g. a headline in thick black type.
2. made up of a large number of things or people close together:
〈群衆などが〉密集した
e.g. his hair was long and thick
e.g. the road winds through thick forest.
predicative (thick with) densely filled or covered with:
〖be ~ with A〗 A〈物・人〉でいっぱいの, A〈ほこりなど〉で厚く覆われた
e.g. the room was thick with smoke
e.g. figurative : the air was thick with tension.
(of the air or atmosphere, or a substance in the air) opaque, dense, or heavy:
〈霧・煙などが〉濃い
e.g. a thick cloud of smoke
e.g. the shore was obscured by thick fog.
3. (of a liquid or a semiliquid substance) relatively firm in consistency; not flowing freely:
〈液体が〉濃い, 濃厚な, どろりとした (!お茶・コーヒー類が「濃い」は通例strongで, ╳thick coffeeなどとしない) ; 〈液体・川などが〉濁った
e.g. thick mud.
4. informal of low intelligence; stupid:
⦅英・くだけて⦆ 頭の鈍い, まぬけな.
e.g. he's a bit thick
e.g. I've got to shout to get it into your thick head.
5. (of a voice) not clear or distinct; hoarse or husky.
〈声などが〉かすれた, くぐもった, しわがれた(↔ clear)
(of an accent) very marked and difficult to understand:
〖通例名詞の前で〗なまりの強い〈アクセント〉
e.g. a thick French accent.
6. predicative informal having a very close, friendly relationship:
⦅やや古⦆ ; 〖通例be ~〗 【人と】親しい, 親密な «with» .
e.g. he's very thick with the new boss.

noun (the thick)
the busiest or most crowded part of something; the middle of something:
一番厚い[太い, 濃い]部分
e.g. the thick of battle.

adverb
in or with deep, dense, or heavy mass:
厚く; 太く; 濃く; びっしりと(間をつめて)
e.g. bread spread thick with butter.

PHRASES
see ground1.

British informal unfair or unreasonable.

see skin.

rapidly and in great numbers.

very stupid:
e.g. her employers must see that she is perceived as being as thick as a brick.

informal (of two or more people) very close or friendly; sharing secrets.

under all circumstances, no matter how difficult:
e.g. they stuck together through thick and thin.

DERIVATIVES
thickish adjective

ORIGIN
Old English thicce, of Germanic origin; related to Dutch dik and German dick.