Blush/blʌʃ/ Definition 1 of 4Pro Tip 1/2Non-verbal Cue Blushing is a spontaneous reaction and can be a non-verbal cue of one's feelings. Noticing her blush, I knew she was embarrassed. Pro Tip 2/2Cultural Variability Blushing can indicate modesty or respect in some cultures, not always embarrassment. In Japan, a blush may be a sign of politeness.