verb (used with object)

to stretch forth.
to extend in duration.

verb (used without object)

to stretch forward.

Origin of protend

1400–50; late Middle English protenden < Latin protendere to stretch out, extend, equivalent to pro- pro-1 + tendere to stretch; see tend1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019