castile soap
noun
cas·tile soap
(ˌ)ka-ˈstēl- 
variants
often Castile soap
: a fine hard bland soap made from olive oil and sodium hydroxide
also
: any of various similar soaps
Examples of castile soap in a Sentence
Recent Examples on the Web
Next, stir in the liquid Castile soap and the remaining water.
—
Ryan Brennan
may 13, Kansas City Star, 13 May 2026
Lemon juice can similarly be too acidic, baking soda can scuff vinyl floors when used in excess, and even Castile soap leaves behind a sticky residue that attracts grime.
—Shagun Khare, The Spruce, 8 Mar. 2026
Mix a small amount of castile soap with lukewarm water.
—Louise Parks, Martha Stewart, 5 Feb. 2026
To start, wash these items in a bucket or sink filled with warm water and give them a good scrubbing with a brush and dish soap or Castile soap.
—Lauren Landers, Better Homes & Gardens, 2 Feb. 2026
See All Example Sentences for castile soap
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Ryan Brennan
may 13, Kansas City Star, 13 May 2026
Lemon juice can similarly be too acidic, baking soda can scuff vinyl floors when used in excess, and even Castile soap leaves behind a sticky residue that attracts grime.
—Shagun Khare, The Spruce, 8 Mar. 2026
Mix a small amount of castile soap with lukewarm water.
—Louise Parks, Martha Stewart, 5 Feb. 2026
To start, wash these items in a bucket or sink filled with warm water and give them a good scrubbing with a brush and dish soap or Castile soap.
—Lauren Landers, Better Homes & Gardens, 2 Feb. 2026
See All Example Sentences for castile soap
Cite this Entry
“Castile soap.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/castile%20soap. Accessed 29 May. 2026.
Copy CitationMedical Definition
castile soap
noun
cas·tile soap
(ˌ)kas-ˌtēl-
: a fine hard bland soap made from olive oil and sodium hydroxide
also
: any of various similar soaps
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