Definition of tweets:
(n) :
(social media) An entry posted on the microblogging service Twitter.
(v) :
(ambitransitive, social media) To post an entry to Twitter.
(n) :
(social media, by extension) An entry on any microblogging service.
(v) :
(ambitransitive, social media, by extension) To post an entry to any microblogging site.
(n) :
The sound of a bird; any short high-pitched sound or whistle.
(v) :
(intransitive) To produce a short high-pitched sound, similar to that of certain birds.