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noun \ˈsīd\

Definition of side

  1. 1a :  the right or left part of the wall or trunk of the body <a pain in the side>b (1) :  one of the halves of the animal body on either side of the median plane (2) :  a cut of meat including that about the ribs of one half of the body —used chiefly of smoked pork productsc :  one longitudinal half of a hide

  2. 2 :  a place, space, or direction with respect to a center or to a line of division (as of an aisle, river, or street)

  3. 3a :  one of the longer bounding surfaces or lines of an object especially contrasted with the ends <the side of a barn>b :  a line or surface forming a border or face of an object <a die has six sides> <the back side of the moon>c :  either surface of a thin object <one side of a record> <right side of the cloth>d :  a bounding line of a geometric figure <side of a triangle>

  4. 4a :  the space beside one <stood by my side>b :  an area next to something —usually used in combination <a poolside interview>

  5. 5 :  a slope (as of a hill) considered as opposed to another slope <the far side of the hill>

  6. 6a :  the attitude or activity of one person or group with respect to another :  part <there was no malice on my side>b :  a position that is opposite to or contrasted with another <two sides to every question> <came down on the side of law and order>c :  a body of partisans or contestants <victory for neither side>d :  team 4a <11 players on each side>; also :  the players on a baseball team batting in an inning <struck out the side>

  7. 7 :  a line of descent traced through one's parent <grandfather on his mother's side>

  8. 8 :  an aspect or part of something contrasted with some other real or implied aspect or part <the better side of his nature> <the sales side of the business> <the seasoning is a bit on the heavy side>

  9. 9 British :  sideways spin imparted to a billiard or snooker ball

  10. 10 :  a sheet containing the lines and cues for a single theatrical role

  11. 11 :  a recording of music

  12. 12 :  a side order or dish <a side of fries>

on the side
  1. 1 :  in addition to the main portion

  2. 2 :  in addition to a principal occupation

  3. 3 :  secretly outside of one's marriage or romantic relationship <seeing another woman on the side>

this side of
  1. :  short of :  almost <an attitude just this side of scandalous>

Origin of side

Middle English, from Old English sīde; akin to Old High German sīta side, Old English sīd ample, wide

First Known Use: before 12th century




Simple Definition of side

  • : of or located on the side of something

  • : happening or done in addition to the main or most important thing

  • : in addition to the main meal

Full Definition of side

  1. 1a :  situated on the side <side window>b :  of or relating to the side

  2. 2a :  directed toward or from the side <side thrust> <side wind>b :  incidental, indirect <side issue> <side remark>c :  made on the side <side payment>d :  additional to the main portion <a side order of french fries>

Examples of side

  1. a front and side view of the car

  2. The jacket has side pockets.

  3. Please use the side door.

  4. A side benefit of the drug is that it helps patients relax.

  5. She took on a side project during the summer.

  6. I had a burger with a side order of fries.

  7. I'll have rice as a side dish.

14th Century

First Known Use of side

14th century




Simple Definition of side

  • : to cover the outside walls of (a building) with long pieces of material (called siding)

Full Definition of side


  1. transitive verb
  2. 1 :  to agree with :  support

  3. 2 :  to be side by side with

  4. 3 :  to set or put aside :  clear away <side the dishes>

  5. 4 :  to furnish with sides or siding <side a house>

  6. intransitive verb
  7. :  to take sides :  join or form sides <sided with the rebels>

Examples of side

  1. They just sided their house.


First Known Use of side





Definition of side

chiefly British

  1. :  swaggering or arrogant manner :  pretentiousness

Origin of side

obsolete English side proud, boastful

First Known Use: 1878

Medical Dictionary


noun \ˈsīd\

Medical Definition of side

  1. 1:  the right or left part of the wall or trunk of the body <a pain in the side>

  2. 2:  one of the halves of the animal body on either side of the midsagittal plane

  3. 3:  a lateral half or part of an organ or structure <burned on the right side of one leg>

Seen and Heard

What made you want to look up side? Please tell us where you read or heard it (including the quote, if possible).


February 14, 2016

to hug and kiss another person

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