'straightaway' definitions:

Definition of 'straightaway'

(from WordNet)
adverb
Without delay or hesitation; with no time intervening; "he answered immediately"; "found an answer straightaway"; "an official accused of dishonesty should be suspended forthwith"; "Come here now!" [syn: immediately, instantly, straightaway, straight off, directly, now, right away, at once, forthwith, like a shot]
adjective
Performed with little or no delay; "an immediate reply to my letter"; "a prompt reply"; "was quick to respond"; "a straightaway denial" [syn: immediate, prompt, quick, straightaway]
noun
A straight segment of a roadway or racecourse [syn: straightaway, straight]

Synonyms of 'straightaway'

From: Moby Thesaurus