Definition of podcasts:
(n) :
A program, especially an audio program, produced on a regular basis, delivered over the Internet in a compressed digital format and designed for playback on computers or portable devices such as mobile phones.
(n) :
(loosely, by extension) An individual episode of such a program.
(v) :
(transitive) To deliver (information) in the form of a program, especially an audio program, over the Internet on a regular basis for playback on computers or portable devices such as mobile phones.
(v) :
(intransitive) To deliver a program, especially an audio program, over the Internet on a regular basis for playback on computers or portable devices such as mobile phones.