Definition of "underset" [un•der•set]

• An ocean undercurrent. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Should the fly alight at too great a distance for even a second leap, the blenny moves slowly towards it like a cat to its prey, or like a jumping spider; and, as soon as it gets within two or three inches of the insect, by a sudden spring contrives to pop its underset mouth directly over the unlucky victim."
• "The great arches, and the groin ribs of the aisle ceilings were underset with new pillars; so that we get Early English _arches_ of the thirteenth century on Decorated"
• "DARNING AND PATCHING. (a) In gingham or figures cotton, make an underset patch of a square hole, matching the goods. (b) Darn a three-cornered tear."