a. A crossbeam.
b. A section, as of a ceiling, formed by crossbeams.
2. A wooden frame used to confine a horse being shod.
[Middle English, from Old French, from Latin trabs, trab-; see treb- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.