From Middle English tofal, equivalent to to- + fall. Compare Dutch toeval, German Zufall, Danish tilfælde, Swedish tillfälle, Icelandic tilfelli. More at to, fall.
tofall (plural tofalls)
- Decline; settling; end; close.
- at to-fall of the day — A. E. Houseman, More Poems, XLIV
- (archaic, architechture) A shed or building annexed to the wall of a larger one, having its roof formed in a single slope with the top resting against the wall; lean-to.