Definition of soffit
: the underside of a part or member of a building (as of an overhang or staircase); especially : the intrados of an arch
Origin and Etymology of soffit
French soffite, from Italian soffitto, from Vulgar Latin *suffictus, past participle of Latin suffigere to fasten underneath — more at suffix
First Known Use: 1592
Learn More about soffit
Seen and Heard
What made you want to look up soffit? Please tell us where you read or heard it (including the quote, if possible).