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

• dictatorship
• diction
• dictionary
• dictionary definition
• dictionary entry
• dictostylium
• dictum
• Dictyophera
• Dictyoptera
• dictyopteran
• dictyopterous insect
• dictyosome
• dicumarol
• dicynodont
• Dicynodontia
• didactic
• didactical
• didactically
• didacticism
• didactics
• didanosine
• didder
• diddle
• diddler
• diddley