'Sinful' definitions:

Definition of 'sinful'

From: WordNet
adjective
Characterized by iniquity; wicked because it is believed to be a sin; "iniquitous deeds"; "he said it was sinful to wear lipstick"; "ungodly acts" [syn: iniquitous, sinful, ungodly]
adjective
Having committed unrighteous acts; "a sinful person" [syn: sinful, unholy, wicked]
adjective
Far more than usual or expected; "an extraordinary desire for approval"; "it was an over-the-top experience" [syn: extraordinary, over-the-top, sinful]

Definition of 'Sinful'

From: GCIDE
  • Sinful \Sin"ful\, a. [AAS. synfull.] Tainted with, or full of, sin; wicked; iniquitous; criminal; unholy; as, sinful men; sinful thoughts. --Piers Plowman. [1913 Webster]
  • Ah sinful nation, a people laden with iniquity. --Isa. i. 4. [1913 Webster] -- {Sin"ful*ly}, adv. -- {Sin"ful*ness}, n. [1913 Webster]