What does mold mean?
“Mold” is an English noun with several related but distinct uses. In its most familiar sense, it denotes a fungal growth that develops on damp or decaying material. It can also name a hollow form into which liquid or soft material is poured to create a particular shape. In manufacturing and design, “mold” may refer more broadly to the original model or pattern from which an object is produced. As a verb, “mold” means to give something a specified shape, especially by means of a mold, and figuratively to influence how something develops. American English uses “mold,” while British English generally uses “mould” for all these meanings. The word is useful because it links the everyday idea of organic form with technical processes used to manufacture objects and with broader figurative ideas about shaping people, institutions, or future outcomes.
A soft fungal growth on damp or decaying organic matter; a form used to shape a material; or an original pattern from which something is made.
"The manufacturer removed the finished piece from the mold."
The spelling “mould” is standard in British English.
To shape something in a mold, or figuratively to influence or determine its development.
"Good teachers help mold young minds without dictating every thought."
The figurative sense is common in formal and literary writing.
The standard American plural is “molds”; the British spelling normally pluralizes as “moulds.”
"Inspect the molds before pouring the concrete."
In American English, the word for a fuzzy fungus is also the word for the form—or digital blueprint—that gives an object its shape.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of mold
The word comes through Middle English from Old English “mōld,” associated with soil, earth, and the organic material from which molds develop. Its development allowed it to cover both earthy or fungal growths and forms or processes that shape materials. “Mould” remains the standard British spelling, while “mold” is the established American spelling.
Related word forms
How mold is actually used
In American English, “mold” is the usual spelling for all senses; “mould” is the standard British form. The fungal sense is common in both regional varieties, while the senses involving a form, pattern, or process may be formal or technical depending on context.
Easily confused with mold
“Mould” is the standard British spelling of the same word, whereas “mold” is the standard American spelling.
Mildew specifically refers to a fungal coating that commonly appears on damp surfaces, while “mold” is broader and may describe various fungal growths or other meanings of the word.