
1) Coronation gown 2) Tunic 
Found on 
https://www.crosswordclues.com/clue/kirtle

 A kirtle (sometimes called cotte, cotehardie) is a garment worn by men and women in the Middle Ages or, later, a one-piece garment worn by women from the later Middle Ages into the Baroque period. The kirtle was typically worn over a chemise or smock which acted as a slip and under the formal outer garment or gown/surcoat. Kirtles were part of fas...
Found on 
http://en.wikipedia.org/wiki/Kirtle

man's or woman's tunic or coat
Found on 
http://phrontistery.info/k.html

• (n.) A garment varying in form and use at different times, and worn doth by men and women.
Found on 
http://thinkexist.com/dictionary/meaning/kirtle/

A garment varying in form and use at different times, and worn doth by men and women. 'Wearing her Norman car, and her kirtle of blue.' (Longfellow) ... The term is still retained in the provinces, in the sense of ' an outer petticoat.' ... Origin: OE. Kirtel, curtel, AS. Cyrtel; skin to Icel. Kyrtill, Sw. Kjortel, Dan. Kiortel, kiole. ... Source: ...
Found on 
http://www.encyclo.co.uk/local/20973
 Kir'tle  noun
Kir'tle  noun [ Middle English 
 kirtel , 
 curtel , Anglo-Saxon 
 cyrtel ; skin to Icelandic 
 kyrtill , Swedish 
 kjortel , Danish 
 kiortel , 
 kiole .] A garment varying in form and use at different times, and worn both by men and women. « Wearing her Norm...
Found on 
http://www.encyclo.co.uk/webster/K/12

A kirtle was a quantity of flax weighing about 100 lbs.
Found on 
http://www.probertencyclopaedia.com/browse/AK.HTM

A kirtle was a sort of upper garment, a gown, petticoat or short jacket.
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http://www.probertencyclopaedia.com/browse/PK.HTM

[
n] - a garment resembling a tunic that was worn by men in the Middle Ages 2. [n] - a long dress worn by women
Found on 
http://www.webdictionary.co.uk/definition.php?query=kirtle
 noun
 noun a long dress worn by women
Found on 
https://www.encyclo.co.uk/local/20974

consisted of a bodice and skirt sewn together and fell in ample folds which trailed on the ground.
Found on 
https://www.encyclo.co.uk/local/21654

a woman's loose gown, worn in the Middle Ages. · a man's tunic.
Found on 
https://www.infoplease.com/dictionary/kirtle
  No exact match found.