Nifty/ˈnɪfti/ Definition 1 of 3Pro Tip 1/3Creativity Praised Use 'nifty' to show admiration for someone's cleverness or originality. Your method for organizing tools is pretty nifty! Pro Tip 2/3Not for Formality 'Nifty' is casual, avoid it in formal writing or speeches. In emails to friends, you can say 'I found a nifty app!' Pro Tip 3/3Positive Vibes 'Nifty' has a positive connotation, indicating approval or satisfaction. That's a nifty solution to the problem!