noun pod·cast \ˈpäd-ˌkast\
Definition of podcast
Popularity: Bottom 40% of words
: a program (as of music or talk) made available in digital format for automatic download over the Internet
Origin of podcast
iPod, trademark for a portable media player + broadcast
First Known Use: 2004
noun: podcast; plural noun: podcasts
1.a digital audio file made available on the Internet for downloading to a computer or portable media player, typically available as a series, new instalments of which can be received by subscribers automatically.
verb: podcast; 3rd person present: podcasts; gerund or present participle: podcasting; past tense: podcast; past participle: podcast
1.make (a digital audio file) available as a podcast.
Wikipedia on the other side has a more inclusive definition, which, in my opinion, takes away from the general understanding of the word “podcast” :
“A podcast is a form of digital media that consists of an episodic series of audio, video, digital radio, PDF, or ePub files subscribed to anddownloaded through web syndication or streamed online to a computer or mobile device. The word is a portmanteau of “(i)Pod” and “broadcast.””
More from Wikipedia here.