Side-by-side

Alternative forms

• side by side

Origin

From side + by + side.

Full definition of side-by-side

Adjective

1. Adjacent.
• 2013-06-01, Ideas coming down the track, A “moving platform” scheme...is more technologically ambitious than maglev trains even though it relies on conventional rails. Local trains would use side-by-side rails to roll alongside intercity trains and allow passengers to switch trains by stepping through docking bays.

Usage notes

This hyphenated spelling is usually used before a noun it modifies, whereas the unhyphenated spelling is used after a noun it modifies.