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

• Martes americana
• Martes foina
• Martes martes
• Martes pennanti
• Martes zibellina
• Martha Beatrice Potter Webb
• Martha Graham
• Martha Jane Burk
• Martha Jane Burke
• Martha's Vineyard
• Marti
• martial
• martial art
• martial law
• martial music
• martially
• Martian
• martin
• Martin Buber
• Martin Cline
• Martin Heidegger
• Martin Heinrich Klaproth
• Martin Luther
• Martin Luther King
• Martin Luther King Day