petticoat

Short definition from Wiktionary

Noun

1. 1
   A tight, usually padded undercoat worn by women over a shirt and under the doublet.
2. 2
   A woman's undercoat, worn to be displayed beneath an open gown.
3. 3
   A fisherman's loose canvas or oilcloth skirt.
4. 4
   A type of ornamental skirt or underskirt, often displayed below a dress; chiefly in plural, designating a woman's skirts collectively.
5. 5
   A light woman's undergarment worn under a dress or skirt, and hanging either from the shoulders or (now especially) from the waist; a kind of slip, worn to make the skirt fuller, or for extra warmth.
6. 6
   A woman.
7. 7
   A bell-mouthed piece over the exhaust nozzles in the smokebox of a locomotive, strengthening and equalising the draught through the boiler-tubes.

Verb

1. 1
   To dress in a petticoat.

Adjective

1. 1
   Feminine; female; involving a woman.