Small, pretty bouquets of flowers, often given as gifts or carried at celebrations like weddings.
From Middle English 'posy' or 'poesy' (poetry); originally meant a short poem, but evolved to mean a small arrangement of flowers (flowers and poetry both being beautiful things).
In Victorian times, posies were so coded with flower meanings that young people could send secret messages through them—a red rose meant love, yellow meant jealousy, and receiving the right posy was basically a text message!
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