from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An ocean undercurrent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To set under or beneath.
- v. To prop or support.
- n. undercurrent
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To prop or support.
- n. Undercurrent.
from The Century Dictionary and Cyclopedia
- To support by a prop or stay, as masonry, etc.; underpin; put or place under, as a prop; prop; support.
- To sublet.
- n. Nautical, a current of water below the surface in a direction contrary to that of the wind, or of the water at the surface; an undercurrent.
From Middle English undersetten, from Old English undersettan ("to put, place, or set under, put in the place of another, substitute, falsify, forge, counterfeit, place as a pledge, hypothecate, add, annex, subjoin, make subject, submit, set beneath, esteem less"), equivalent to under- + set. Cognate with Dutch ondersetten ("to put beneath"), German untersetzen ("to put beneath, pin"). (Wiktionary)