(~s)
1.
You can use ~ to indicate how well someone sleeps. For example, if someone is a light ~, they are easily woken up.
I’m a very light ~ and I can hardly get any sleep at all...
N-COUNT: adj N
2.
In British English, a ~ is a carriage on a train containing beds for passengers to sleep in at night, or a section of such a carriage. The usual American words are sleeping car for the carriage and roomette for the section.
N-COUNT
3.
A ~ is a train with beds for its passengers to sleep in at night. (BRIT)
N-COUNT
4.
Railway ~s are large heavy beams that support the rails of a railway track. (BRIT; in AM, use ties )
N-COUNT: oft n N