Optional sidetrack Synonyms

Optional replaced

Definitions for Optional


  • (adjective) subject to one's freedom of choice
  • (adjective) possible but not necessary; left to personal choice

Synonyms for phrase

OS abbreviation

OS is an abbreviation for Optional Sidetrack
What does OS stand for?
OS stands for "Optional Sidetrack"

Sidetrack replaced

Definitions for Sidetrack


  • (verb) wander from a direct or straight course
  • (noun) a short stretch of railroad track used to store rolling stock or enable trains on the same line to pass