(1) The continuous flow of data from one place to another.

(2) Any contiguous group of bytes or chunk/block of data.

(3) To transmit data over a network. It implies sending an entire file.

(4) To play live or on-demand audio and video from an IP-based network server. See streaming audio and streaming video.

(5) The I/O management in the C programming language. A stream is a channel through which data flows to/from a disk, keyboard, printer, etc.

(6) The data part of a Structured Storage file. See Structured Storage.