tethern.[Formerly tedder, OE. tedir; akin to LG. tider, tier, Icel. tjr, Dan. tir. 64.] A long rope or chain by which an animal is fastened, as to a stake, so that it can range or feed only within certain limits.()v. t. To confine, as an animal, with a long rope or chain, as for feeding within certain limits.()And by a slender cord was tethered to a stone. (Wordsworth.)