From Middle English sope, sape, from Old English sāpe (“soap, salve”), from Proto-West Germanic *saipā, from Proto-Germanic *saipǭ, from Proto-Indo-European *seyb-, *seyp- (“to pour out, drip, trickle, strain”). Cognate with Scots saip, sape (“soap”), Saterland Frisian Seepe (“soap”), West Frisian sjippe (“soap”), Dutch zeep (“soap”), German Low German Seep (“soap”), German Seife (“soap”), Danish sæbe (“soap”), Swedish såpa (“soap”), Norwegian Bokmål såpe (“soap”), Norwegian Nynorsk såpe (“soap”), Faroese sápa (“soap”), Icelandic sápa (“soap”), Finnish saippua (“soap”), Finnish suopa (“soft soap”). Related also to Old English sāp (“amber, resin, pomade, unguent”), Latin sēbum (“tallow, fat, grease”). See seep. Latin sāpō (“soap”) is a borrowing from the Germanic.
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Chemistry, Natural sciences, Physical sciences A metallic salt derived from a fatty acid, commonly used in cleaning products.
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Chemistry, Geography, Geology, Mineralogy, Natural sciences, Physical sciencesBroadly, Informal Some other substance, often a detergent or another surfactant, able to mix with both oil and water, used for cleaning.
I tried washing my hands with soap, but the stain wouldn't go away.
She went to the shop to buy soap, but they had run out.
From Middle English sope, sape, from Old English sāpe (“soap, salve”), from Proto-West Germanic *saipā, from Proto-Germanic *saipǭ, from Proto-Indo-European *seyb-, *seyp- (“to pour out, drip, trickle, strain”). Cognate with Scots saip, sape (“soap”), Saterland Frisian Seepe (“soap”), West Frisian sjippe (“soap”), Dutch zeep (“soap”), German Low German Seep (“soap”), German Seife (“soap”), Danish sæbe (“soap”), Swedish såpa (“soap”), Norwegian Bokmål såpe (“soap”), Norwegian Nynorsk såpe (“soap”), Faroese sápa (“soap”), Icelandic sápa (“soap”), Finnish saippua (“soap”), Finnish suopa (“soft soap”). Related also to Old English sāp (“amber, resin, pomade, unguent”), Latin sēbum (“tallow, fat, grease”). See seep. Latin sāpō (“soap”) is a borrowing from the Germanic.
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To apply soap to in washing.
Be sure to soap yourself well before rinsing.
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Informal To cover, lather, or in any other manner treat with soap, often as a prank.
'Time? Doesn't have much meaning when they're trying to dry you out. I rather think they gave me a shot of soap at one point.' Soap is intelligence speak for sodium pentathol.2013, John Gardner, James Bond: The John Gardner Years: