1 definition by TheAvalorian

1. A headpiece mostly worn by princesses of a royal family, or just for a costume.

2. A smart and pretty girl who can be a bitch at times. She'll treat their friends with love and respect, and will probably have a lot of boys after her. Possible founder of a secret organisation called the Illuminati
She wore a tiara on her head.

That Tiara girl is pretty hot.
by TheAvalorian November 15, 2015
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