Dictionary
teth•er
Pronunciation: (te&thslash;'ur), [key]—
n.
1. a rope, chain, or the like, by which an animal is fastened to a fixed object so as to limit its range of movement.
2. the utmost length to which one can go in action; the utmost extent or limit of ability or resources.
3. at the end of one's tether, at the end of one's resources, patience, or strength.
—
v.t.
to fasten or confine with or as if with a tether.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.