Longman Dictionary of Contemporary English
Wiktionary
used less than normal or desirable. v
(en-past of: underuse)
Usage examples of "underused".
Rome, and thanks to wars and migrations there are many districts up and down this peninsula that have become as underused and underpopulated as any part of modern Greece.
Jeremy is tempted to say that most talents are likely to be underused in trying to teach cretins, but fortunately Andrea intervenes to ask, 'Have all the staff got degrees?
And because he's still basically a little kid, and not fully in control of his own metaprogramming, instead of adjusting his outlook so that he isn't bored anymore, he sneaks out through his bedroom gate (which big-Manni-ghost reprogrammed for him sometime ago so that it would forward to an underused public A-gate that he'd run a man-in-the-middle hack on, so he could use it as a proxy teleport server) then down to the underside of Red Plaza, where skinless things gibber and howl at their tormentors, broken angels are crucified on the pillars that hold up the sky, and gangs of semiferal children act out their psychotic fantasies on mouthless android replicas of parents and authorities.
For the post office was next to the village green, let at a peppercorn rent by the local landowner for cricket, and next to that was the war memorial with the shocking numbers of dead from such a small place, and behind that again was a devotion to a country capable of such equanimity that the decision to close an underused amenity for one afternoon could cause uproar.