(chemistry) A metallic salt derived from a fatty acid, commonly used in cleaning products.

(countable, uncountable, informal, by extension) Some other substance, often a detergent or another surfactant, able to mix with both oil and water, used for cleaning.

(slang) Money, specially when used as a bribe.

(countable, informal) A soap opera.

(countable) A solid masonry unit or brick reduced in depth or height from standard dimensions.

(slang) thiopental (sodium pentothal)

(transitive) To apply soap to in washing.

(transitive, informal) To cover, lather or in any other form treat with soap, often as a prank.

(transitive, informal) To be discreet about (a topic).