thick

1 thick /ˈθɪk/ adjective
thicker; thickest
1 thick
/ˈθɪk/
adjective
thicker; thickest
Britannica Dictionary definition of THICK
[also more thick; most thick]
1 
a  : having a large distance between the top and bottom or front and back surfaces : not thin
b  : having a specified distance from one surface to the opposite surface : having a specified thickness
2 
a  : having parts that are close together
b  : growing closely together and in a large amount
3 
: difficult to see through : dense
4 
of a liquid : not flowing easily
5 
a  of speech or the voice : difficult to understand — often + with
b  of a person's accent : very easy to notice
6 
informal : stupid 1
7 
not used before a noun
a  chiefly US : existing in great numbers or large amounts
b  : having great numbers or a large amount of something — + with
8 
not used before a noun, informal : having a close and friendly relationship
— often + with

a thick ear

British, informal
: the punishment of being hit on the side of the head

(a) thick skin

— see 1skin

blood is thicker than water

— see blood

thick on the ground

: existing or occurring in large amounts
2 thick /ˈθɪk/ adverb
thicker; thickest
2 thick
/ˈθɪk/
adverb
thicker; thickest
Britannica Dictionary definition of THICK
[also more thick; most thick]
1 
: in a way that makes thick pieces, layers, etc.
2 
: in great numbers

lay it on thick

— see 1lay
3 thick /ˈθɪk/ noun
3 thick
/ˈθɪk/
noun
Britannica Dictionary definition of THICK

in the thick of

: in the most active or intense part of (something)

through thick and thin

: through many difficult times over a long period