a rope, chain, or the like, by which an animal is fastened to a fixed object so as to limit its range of movement.
the utmost length to which one can go in action; the utmost extent or limit of ability or resources.
to fasten or confine with or as if with a tether.
Digital Technology. to use (an electronic device, usually a smartphone or tablet) to enable a wireless Internet connection on another nearby device, often a laptop: There's no wi-fi, so I'll have to tether my phone to my laptop.
Digital Technology. to use an electronic device to enable a wireless Internet connection on another device.