'Speediest' definitions:

Definition of 'Speediest'

From: GCIDE

Speedy \Speed"y\ (-[y^]), a. [Compar. Speedier; superl. Speediest.] [AS. sp[=e]dyg.] Not dilatory or slow; quick; swift; nimble; hasty; rapid in motion or performance; as, a speedy flight; on speedy foot. [1913 Webster]
I will wish her speedy strength. --Shak. [1913 Webster]
Darts, which not the good could shun, The speedy ould outfly. --Dryden. [1913 Webster]