1. Nearest in space or position; immediately adjoining without intervening space
   "our rooms were side by side"
   - adjacent, next 
2. Closely related or associated
   "a city in which communism and democracy had to live side by side"

See also: close, related, related to

• witless
• witloof
• witness
• witness box
• witness stand
• witnesser
• Witold Gombrowicz
• wits
• witted
• witter
• Wittgenstein
• Wittgensteinian
• witticism
• wittily
• wittiness
• witting
• wittingly
• wittol
• witty
• Witwatersrand
• wive
• wivern
• wiz
• wizard
• wizardly