Definition of resin
(Entry 1 of 2)
1a
: 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
2a
: 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
resin
verbDefinition of resin (Entry 2 of 2)
: to treat with resin
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Merriam-Webster unabridged
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Time Traveler for resin
The first known use of resin was in the 14th century
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