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

• Punicaceae
• punily
• puniness
• punish
• punishable
• punished
• punisher
• punishing
• punishingly
• punishment
• punitive
• punitive damages
• punitively
• punitorily
• punitory
• Punjab
• Punjabi
• punk
• punk rock
• punk rocker
• punkah
• punkey
• punkie
• punks
• punky