Pretty/ˈprɪti/ Definition 1 of 4Pro Tip 1/3Not Exact Certainty Use 'pretty' to show you’re not 100% certain, but you believe it to be true. They seem pretty happy together. Pro Tip 2/3Softens Statement Adding 'pretty' can make a statement less direct and softer. It's pretty cold outside, isn't it? Pro Tip 3/3Not Always Positive Sometimes 'pretty' suggests a mild negative feeling or sarcasm. That's pretty annoying, to be honest.