bed in vb 1. (General Engineering) (preposition) engineering to fit (parts) together accurately or (of parts) to be fitted together, either through machining or use, as in fitting a bearing to its shaft 2. (preposition) to make or become settled and able to work efficiently in harmony Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014