C2 noun #68,292 most common

The principal route or line of a railway.

main line in 30 Seconds

  • (noun) The principal route or line of a railway.
  • (noun) In longline fishing the central line to which the branch lines with baits are attached.
  • (noun) A principal vein into which a drug can be injected.

Meanings

  1. 1
    noun The principal route or line of a railway.
  2. 2
    noun In longline fishing the central line to which the branch lines with baits are attached.
  3. 3
    noun A principal vein into which a drug can be injected.
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