- the curved metal plate in a plow that turns over the earth from the furrow.
- a large blade mounted on the front of a bulldozer to push loose earth.
- a board forming one side or surface of a mold for concrete.
Origin of moldboard
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for moldboard
The moldboard was rough and the curves of no two were alike.The Age of Invention
This shows that the soil is slipping off the moldboard easily.Farm Mechanics
Herbert A. Shearer
The moldboard of this plow is made of wood and covered with thick pieces of iron.
This sod-turning plow has its landside, moldboard, and colter in separate pieces.
The share and point are in one piece; and the moldboard is one piece.
- the US spelling of mouldboard
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012