side by side

Short definition from Wiktionary

Noun

1. 1
   Alternative spelling of side-by-side.
2. 2
   A type of multipurpose off-highway utility vehicle, with four wheels, resembling a club cart or a golf cart
3. 3
   Synonym of double-barreled shotgun. Ellipsis of side-by-side shotgun.
4. 4
   Synonym of double rifle. Ellipsis of side-by-side rifle.
5. 5
   Ellipsis of side-by-side smoothbore rifle, side-by-side smooth-bore rifle, side-by-side smoothbore, or side-by-side smooth bore (“a side-by-side "musket" (unrifled) longarm”).

Adjective

1. 1
   Alternative spelling of side-by-side.
2. 2
   Adjacent; juxtaposed.

Adverb

1. 1
   Beside or alongside one another; close to one another and abreast.
2. 2
   In peace.
3. 3
   With a common purpose.