asynchronous

adjective

• 1 Computing & Telecommunications of or requiring a form of computer control timing protocol in which a specific operation begins upon receipt of an indication (signal) that the preceding operation has been completed.

• 2not going at the same rate and exactly together with something else, in particular.
• (of a machine or motor) not working in time with the alternations of current.
• Astronomy (of a satellite) revolving around the parent planet at a different rate from that at which the planet rotates.
• Astronomy (of an orbit) such that a satellite in it is asynchronous.

• 3(of two or more objects or events) not existing or happening at the same time.