Definition of soap
(Entry 1 of 2)
1a
: a cleansing and emulsifying agent made usually by action of alkali on fat or fatty acids and consisting essentially of sodium or potassium salts of such acids
b
: a salt of a fatty acid and a metal
2
: soap opera
soap
verb
soaped; soaping; soaps
Definition of soap (Entry 2 of 2)
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Merriam-Webster unabridged
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Time Traveler for soap
The first known use of soap was before the 12th century
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