Overpower, v. t. [imp. & p. p. Overpowered; p. pr. & vb. n. Overpowering.]
To excel or exceed in power; to cause to yield; to vanquish; to subdue; as, the light overpowers the eyes. "And overpower'd that gallant few." Wordsworth.
Syn. -- To overbear; overcome; vanquish; defeat; crush; overwhelm; overthrow; rout; conquer; subdue.
1 other Webster entry under this spelling
Overpower, n.
A dominating power. Bacon.
Shades of meaning
Fernald has no entry of its own for overpower; he lists it under conquer.
He lists it without comment; the entries above explain its neighbors.