(music) A meter of two quarter notes per measure.

(countable) Under the Whyte notation system, a steam locomotive that has a four-wheel leading truck, one powered driving axle and a four-wheel unpowered trailing truck.

Under the Whyte notation system, a steam locomotive that has two leading wheels followed by two coupled driving wheels and four trailing wheels.

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.

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.

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.

plural of 2-4-0

plural of 2-4-2

plural of 2-4-4

Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of four driving wheels, and two trailing wheels on a trailing truck.