- too highly strung; tense
- (of a piano) having two sets of strings crossing each other at an oblique angle
WordReference Random House Unabridged Dictionary of American English © 2019
- overly tense or sensitive;
on edge:Their nerves were badly overstrung.
- Sport[Archery.](of a bow) strung too tightly.
- over- + strung 1800–10