1. Superlative form of gay; most cheerful, lively, or carefree.
Usage: dated or literary usage; less common in modern English
2. Superlative form of gay; most brightly colored or showy.
Usage: dated or literary usage
3. Superlative form of gay; most openly identifying as homosexual or relating most to LGBTQ+ identity.
Usage: modern usage

Examples

• The gayest colors in the rainbow are red and yellow.
• She wore her gayest dress to the celebration.
• That was the gayest party I've attended all year.
• He seemed in the gayest of moods despite the bad weather.
• The festival featured the gayest decorations throughout the town.