bit

1 bit /bɪt/ noun
plural bits
1 bit
/bɪt/
noun
plural bits
Britannica Dictionary definition of BIT
1 
[count] : a small piece of something — often + of
— see also bits and pieces (below)
2 
[count]
a  chiefly British : a part of something (such as a book, play, etc.)
b  chiefly US : a brief comic performance or joke
c  : a very short performance in a movie, play, etc. — usually used before another noun
3 
[singular] informal : all the things that are connected to an activity, a process, etc.
4 
[count] British : an old coin with a specified small value — see also two bits

a bit

1 
: a little : somewhat or rather
2 
: a small amount or quantity : a little of something
— often + of
3 
a  : a short period of time : a while
b  : for a short period of time

a bit much

informal
— used to describe a person or thing that is regarded as annoying, excessive, or unfair

a bit of a/an

chiefly British
— used to make a statement or description less forceful or definite

a bit of all right

British, informal
: someone or something very pleasing
especially : a sexually attractive person

a little bit

— see 3little

bit by bit

: by small steps or amounts : gradually

bits and pieces

1 
: small pieces
2 
or British bits and bobs : things or objects of different kinds

do your bit

chiefly British
: to do your share of a job or task

every bit

: in every way

not a/one bit

or not (in) the least/smallest/slightest/tiniest bit
: not at all

not a bit of it

British, informal
— used to say that something expected or possible did not happen or is not true

quite a bit

or chiefly British a good/fair bit
: a fairly large amount : a lot

take a bit of doing

— see doing

to bits

1 
: to pieces : apart
2 
informal : to a very great degree
2 bit /ˈbɪt/ noun
plural bits
2 bit
/ˈbɪt/
noun
plural bits
Britannica Dictionary definition of BIT
[count]
1 
: the part of a tool (such as a drill) that is used for cutting, drilling, etc. — see picture at carpentry
2 
: a piece of metal that is put in the mouth of a horse and that is part of the device (called a bridle) that is used to control the horse — see picture at horse

champing/chomping at the bit

: waiting in an impatient way to do something

get/take the bit between your teeth

: to start doing something in a very enthusiastic and determined way
3 bit /ˈbɪt/ noun
plural bits
3 bit
/ˈbɪt/
noun
plural bits
Britannica Dictionary definition of BIT
[count] computers
: a single unit of computer information that is represented as either 1 or 0 — compare byte; see also megabit
4 bit
4 bit
Britannica Dictionary definition of BIT
past tense of 1bite