asynchronous /eɪˈsɪŋ.kɹə.nəs/ adjective3 •Not synchronous; occurring at different times.These cyberforums are asynchronous; that is, contributors post (i.e., publish a text message) without the need for fellow communicants to be online at the same time. — 2013 •Allowing the node, program or thread of interest to continue during processing. •Having many actions occurring at a time, in any order, without waiting for each other.