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

• Pd
• PDA
• PDF
• PDFLP
• pdl
• PDQ
• pe
• pe-tsai
• pea
• pea bean
• pea brain
• pea crab
• pea family
• pea flour
• pea jacket
• pea plant
• pea pod
• pea shooter
• pea soup
• pea tree
• pea weevil
• pea-green
• pea-souper
• Peabody
• peace