1. [early 17C; early 19C+] to talk; esp. as pipe out v., to start talking, to interrupt; hit the pipe v., to inform.
2. [late 18C–19C] to weep; thus piping n. and adj., crying.
3. [early–mid-19C] to breathe heavily, through exertion, e.g. in a prizefight.
4. [1990s+] (US black) to sing.
[1920s–40s] (US) to beg in a city’s main street.
see separate entry.
[late 19C] to cry.