1
a
: any of various solid or semisolid amorphous fusible flammable natural organic substances that are usually transparent or translucent and yellowish to brown, are formed especially in plant secretions, are soluble in organic solvents (such as ether) but not in water, are electrical nonconductors, and are used chiefly in varnishes, printing inks, plastics, and sizes and in medicine
b
: rosin
2
a
: any of a large class of synthetic products that have some of the physical properties of natural resins but are different chemically and are used chiefly in plastics
b
: any of various products made from a natural resin or a natural polymer
Examples of resin in a Sentence
Recent Examples on the Web
The Jubail petrochemical and industrial complex in Saudi Arabia is offline, knocking out a key world reservoir of resin.
—
Lim Hui Jie, CNBC, 8 June 2026
The company is developing synthetic hard-carbon materials derived from resin and coal, aiming to lower costs and strengthen domestic supply chains.
—Neetika Walter, Interesting Engineering, 8 June 2026
Inspired by wetland plants like mangroves, 12-year-old Ella Barth and Esme Tsai’s prototype glass funnel uses layers of coffee filter paper, gravel, sand, ion exchange resin, charcoal and cotton, mimicking a natural filtration process to help rid local tap water of its chalky taste.
—Karen Billing, San Diego Union-Tribune, 2 June 2026
It’s made from weather-resistant resin that looks like real stone and won’t fade or crack—even after many seasons of use.
—Stephanie Osmanski, Better Homes & Gardens, 2 June 2026
See All Example Sentences for resin
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Lim Hui Jie, CNBC, 8 June 2026
The company is developing synthetic hard-carbon materials derived from resin and coal, aiming to lower costs and strengthen domestic supply chains.
—Neetika Walter, Interesting Engineering, 8 June 2026
Inspired by wetland plants like mangroves, 12-year-old Ella Barth and Esme Tsai’s prototype glass funnel uses layers of coffee filter paper, gravel, sand, ion exchange resin, charcoal and cotton, mimicking a natural filtration process to help rid local tap water of its chalky taste.
—Karen Billing, San Diego Union-Tribune, 2 June 2026
It’s made from weather-resistant resin that looks like real stone and won’t fade or crack—even after many seasons of use.
—Stephanie Osmanski, Better Homes & Gardens, 2 June 2026
See All Example Sentences for resin
Cite this Entry
“Resin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/resin. Accessed 9 Jun. 2026.
Copy CitationMedical Definition
resin
noun
res·in
ˈrez-ᵊn 
1
a
: any of various solid or semisolid amorphous fusible flammable natural organic substances that are usually transparent or translucent and yellowish to brown, are formed especially in plant secretions, are soluble in organic solvents (as ether) but not in water, and are electrical nonconductors
b
: rosin
c
: a solid pharmaceutical preparation consisting chiefly of the resinous principles of a drug or drugs usually extracted by solvents
resin of jalap
2
a
: any of a large class of synthetic products that have some of the physical properties of natural resins but are different chemically and are used chiefly in plastics
b
: any of various products made from a natural resin or a natural polymer
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