What does thicker mean?
Thicker is the comparative form of thick and describes something with greater thickness, width, solidity, density, or consistency. It is especially common when discussing layers, materials, liquids, fog, smoke, lines, or other physical features: a soup may become thicker as it cooks, a fog may grow thicker, or a person may apply a thicker coat of paint. In such contexts, thicker indicates that the relevant physical quality has increased in degree. The word can also have an informal figurative meaning suggesting that someone is slow to understand, as in expressions associated with being “thick” or “thick-headed.” Although usually classified as an adjective, thicker may also function as a comparative adverb, especially when contrasting two sizes or dimensions. It is understood throughout British and American English and is the regular comparative formed by adding “-er” to thick.
Having greater thickness, width, density, solidity, or consistency than something else; informally, less alert or intelligent.
"The painter applied a thicker coat of varnish before the wood was fully dry."
The slang meaning “less alert or intelligent” is informal and often appears in humorous comparisons.
In a manner involving greater thickness, density, or consistency.
"She folded the fabric so the thicker section formed the outer edge."
This is the comparative adverb use of the adjective, commonly found when comparing dimensions or quantities of a physical substance.
Thickness has long been linked with dull-wittedness in expressions such as “as thick as two bricks,” giving the word a comic figurative side.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does thicker come from?
Thicker is a modern comparative form built on thick, which comes from Old English þicce, meaning “thick” or “not thin.” The word continued through Middle English in forms such as thikke before the modern spelling became established. Adding the comparative suffix “-er” produced thicker with the same function it has today. Thick is related to cognates such as Dutch dik and German dick, while thicket and thickness belong to the same English word family.
Related word forms
How thicker is actually used
The physical senses are standard in formal and informal English. The figurative sense meaning dull-witted or slow to understand is informal and often humorous, appearing in phrases such as “thicker than a brick.” As a comparative adjective or adverb, thicker normally takes “than” when an explicit comparison is made.
Easily confused with thicker
A ticker is a device, display, or regular quotation that reports changing information, whereas thicker is the comparative form of thick.