Red/red/ Definition 1 of 7Pro Tip 1/3Emotional Intensity Red often conveys strong emotions like love or anger. He turned red with rage. Pro Tip 2/3Stop and Alert Red is used in signs and signals to grab attention and indicate stopping. The red stop sign is universal. Pro Tip 3/3Cultural Significance In some cultures, red symbolizes good luck, celebration, or prosperity. Red envelopes are given for Chinese New Year.