side

1 side /ˈsaɪd/ noun
plural sides
1 side
/ˈsaɪd/
noun
plural sides
Britannica Dictionary definition of SIDE
1 
[count] : a place, space, or direction that is away from or beyond the center of something
— often used with on or to
2 
[count]
a  : an outer surface or part of something — often + of
b  : one of the surfaces of an object that is not the front, back, top, or bottom — often + of
c  : one of the two surfaces of a thin object — often + of
3 
[count] : a line that forms part of a geometric shape : a surface that forms part of a geometric object
4 
[count] : one of the slopes of a hill or mountain — often + of
— see also hillside, mountainside
5 
[count]
a  : the right or left part of your body : the right or left part of your body from your shoulder to your hip
b  : the place directly to the right or left of someone — usually singular
— often used figuratively
— see also blind side
6 
[count] : one of two or more opinions, positions, etc., that disagree with each other
— see also on your side (below)
7 
[count] : one of the two or more people or groups that are involved in an argument, war, etc.
8 
[count]
a  : a sports team
b  baseball : the players on a team who bat in an inning — usually singular
9 
a  [count] : a particular part or feature of something that is opposite to or different from another part or feature
— often + of
— see also downside, flip side, upside
b  — used in phrases like on the large side, on the heavy side, etc., to describe someone or something as somewhat heavy, large, etc.
10 
[count]
a  : a part of someone's personality that is opposite or different from another part
b  — used in phrases like be/get on someone's good/bad side and be/get on the right/wrong side of someone to talk about doing things that cause someone to like you or dislike you
11 
[count] : the ancestors or relatives of your mother or your father
12 
[count] US : a small amount of food that is ordered in addition to the main meal — often + of
13 
[count] : one of the two halves of an animal that is eaten as food — usually + of
14 
[count] chiefly British : a page of writing on one side of a piece of paper
15 
[count] British, informal + old-fashioned : a television channel — usually singular

a thorn in the/your side

— see thorn

err on the side of

— see err

(from) side to side

: moving to the left and then to the right

let the side down

British
: to disappoint your family, friends, etc., by failing to do what is needed or expected

on side

British
: included among the group of people who support a particular goal, project, etc.

on the bright side

— see bright

on the credit side

— see 1credit

on the debit side

— see 1debit

on the right/wrong side of 30, 40, 50 (etc.)

informal
: younger/older than 30, 40, 50 (etc.)

on the side

1 
a  : in addition to the main item in a meal
b  : served next to something rather than on top of it
2 
: in addition to your main job
3 
: as part of a secret romantic relationship that is outside of your marriage or main romantic relationship

on the wrong/right side of the law

— used to say that someone is or is not living the life of a criminal

on your side

: as an advantage
: helping you to succeed
— see also 1side 6 (above)

side by side

1 
: next to each other and facing in the same direction
2 
: together or very close to each other

split your sides (laughing)

— see 1split

the other side of the coin

— see 1coin

the wrong side of the tracks

— see 1track

this side of

1 
a  : very nearly (something)
b  : that is not (something) : other than (something)
2 
British : before

to the/one side

1 
: to a place that is on one side : aside
2 
: in a state in which something is not dealt with, done, or used until a later time : aside
— see also 1side 1 (above)

two sides of the same coin

— see 1coin
2 side /ˈsaɪd/ adjective
2 side
/ˈsaɪd/
adjective
Britannica Dictionary definition of SIDE
always used before a noun
1 
: of or located on the side of something
2 
: happening or done in addition to the main or most important thing
3 
: in addition to the main meal
3 side /ˈsaɪd/ verb
sides; sided; siding
3 side
/ˈsaɪd/
verb
sides; sided; siding
Britannica Dictionary definition of SIDE
[+ object] US
: to cover the outside walls of (a building) with long pieces of material (called siding)

side against

[phrasal verb]
side against (someone)
: to not agree with (someone) : to not support the opinions or actions of (someone)

side with

[phrasal verb]
side with (someone)
: to agree with or support the opinions or actions of (someone)
4 side /ˈsaɪd/ noun
4 side
/ˈsaɪd/
noun
Britannica Dictionary definition of SIDE
[noncount] British, informal
: an unpleasantly proud attitude or way of behaving