Other forms: hairdos
A hairdo is a person's hair as set and arranged for one occasion. An elaborate hairdo, ruin your hairdo.
It is informal and slightly dated, and it means the arrangement rather than the cut. A hairdo is done for a wedding or a photograph and does not survive a night's sleep.
1nounhairdoInformal and slightly dated: a person's hair as set and arranged for one particular occasion, not the neutral general word for the cut and shape they wear.
“Grandma came back from the salon with a big curly hairdo for the wedding.”
hairdo is a style.
From hair + do.
Etymology from Wiktionary, CC BY-SA