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English definition of “rail”

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rail

noun  /reɪl/ us  

rail noun (TRAINS)

[C/U] one of the two metal bars fixed to the ground on which trains travel [C/U] Rail also means railroad: [U] rail transportation [U] Commuter rail and subway lines will be linked.

rail noun (ROD)

[C] a straight bar or rod fixed in position, esp. to a wall or to vertical posts, used to enclose something or as a support: The car swerved out of control and crashed through a guard rail on the bridge.

rail

verb [I always + adv/prep]  /reɪl/ us  

rail verb [I always + adv/prep] (COMPLAIN)

to complain angrily: He railed against the injustices of the system.
(Definition of rail from the Cambridge Academic Content Dictionary © Cambridge University Press)
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