brush

1 brush /ˈbrʌʃ/ noun
plural brushes
1 brush
/ˈbrʌʃ/
noun
plural brushes
Britannica Dictionary definition of BRUSH
[count]
1 
: a tool with many stiff hairs, fibers, etc., that is used for cleaning, smoothing, or painting something — see picture at dustpan; see also hairbrush, paintbrush, toothbrush
2 
a  : an act of cleaning or smoothing something with a brush
b  : a quick, light movement

(as) daft as a brush

— see daft

tar (someone) with the same brush

— see 2tar
2 brush /ˈbrʌʃ/ verb
brushes; brushed; brushing
2 brush
/ˈbrʌʃ/
verb
brushes; brushed; brushing
Britannica Dictionary definition of BRUSH
[+ object]
1 
a  : to clean or smooth (something) with a brush
b  : to put (something) on or onto something with a brush
2 
: to remove (something) with a brush or with a quick movement of your hand, fingers, etc.
3 
: to touch gently against (something) when going past it
4 
: to move quickly past someone without stopping or paying attention

brush aside

[phrasal verb]
brush (something) aside or brush aside (something)
: to treat (something) as not important : to ignore or dismiss (something)

brush off

[phrasal verb]
1 
brush (something) off or brush off (something) : to treat (something) as not important : to refuse to deal with or talk about (something) in a serious way
2 
brush (someone) off or brush off (someone) : to respond to (someone) in a rude way that shows you are not interested in what is being asked for or suggested
— see also brush-off

brush up

[phrasal verb]
brush up or brush up (something)
: to improve your skill at (something) or increase your knowledge of (something)
— often + on
3 brush /ˈbrʌʃ/ noun
plural brushes
3 brush
/ˈbrʌʃ/
noun
plural brushes
Britannica Dictionary definition of BRUSH
[count]
: a situation in which you briefly experience or almost experience something bad, dangerous, exciting, etc. — + with
4 brush /ˈbrʌʃ/ noun
4 brush
/ˈbrʌʃ/
noun
Britannica Dictionary definition of BRUSH
[noncount]
1 
: wood from small branches on a tree
2 
: small bushes or trees
— see also underbrush