2-4 Definition

noun
Under the Whyte notation system, a steam locomotive that has two leading wheels followed by two sets of coupled driving wheels, and no trailing wheels.
Wiktionary
Under the Whyte notation system, a steam locomotive that has two leading wheels arranged in a leading truck, four coupled driving wheels and two trailing wheels in a trailing truck.
Wiktionary
Under the Whyte notation system, a steam locomotive that has two leading wheels arranged in a leading truck, four coupled driving wheels and four trailing wheels in a trailing truck.
Wiktionary

Other Word Forms of 2-4

Noun

Singular:
2-4
Plural:
2-4-0s, 2-4-2s, 2-4-4s
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