A gap, usually the valence band of an insulator or semiconductor, that would normally be filled with one electron. If an electron accelerated by a voltage moves into a gap, it leaves a gap behind it, and in this way the hole itself appears to move through the substance. Even though holes are in fact the absence of a negatively charged particle (an electron), they can be treated theoretically as positively charged particles, whose motion gives rise to electric current.
Find another word for tunnel. In this page you can discover 13 synonyms, antonyms, idiomatic expressions, and related words for tunnel, like: hole, burrow, underground passage, subway, tube, crawl-space, crawlway, shaft, mine, pit and crosscut.
There's a tunnel under here.
The tunnel vision receded.
A pulse of warmth dispelled the tunnel vision that had begun to form.
The tunnel elbowed around yet another corner.
The darkness immediately engulfed them and they paused a dozen baby steps into the tunnel to allow their eyes to become accustomed to the blackness.