polystyrene
noun
poly·sty·rene
ˌpä-lē-ˈstī-ˌrēn 
: a polymer of styrene
especially
: a rigid transparent thermoplastic that has good physical and electrical insulating properties and is used especially in molded products, foams, and sheet materials
Examples of polystyrene in a Sentence
Recent Examples on the Web
The company sells white polystyrene mats that fold like an accordion, are about 2½ inches thick and can be installed in a day.
—
Evan Bush, NBC news, 27 Mar. 2026
However, a simple solution is to use a cooler made from polystyrene foam.
—Bestreviews, Chicago Tribune, 23 Mar. 2026
House Bill 5524 would prohibit restaurants and other food service businesses from using polystyrene, commonly known as Styrofoam, for takeout, while also limiting items like utensils, napkins and straws.
—Deirdre Bardolf, FOXNews.com, 18 Mar. 2026
Reports on abysmally low rates of recycling for milk cartons and polystyrene had been widely shared even before that.
—Susanne Rust
follow, Los Angeles Times, 18 Mar. 2026
See All Example Sentences for polystyrene
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Evan Bush, NBC news, 27 Mar. 2026
However, a simple solution is to use a cooler made from polystyrene foam.
—Bestreviews, Chicago Tribune, 23 Mar. 2026
House Bill 5524 would prohibit restaurants and other food service businesses from using polystyrene, commonly known as Styrofoam, for takeout, while also limiting items like utensils, napkins and straws.
—Deirdre Bardolf, FOXNews.com, 18 Mar. 2026
Reports on abysmally low rates of recycling for milk cartons and polystyrene had been widely shared even before that.
—Susanne Rust
follow, Los Angeles Times, 18 Mar. 2026
See All Example Sentences for polystyrene
Cite this Entry
“Polystyrene.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polystyrene. Accessed 30 Mar. 2026.
Copy CitationKids Definition
polystyrene
noun
poly·sty·rene
ˌpäl-i-ˈstī(ə)r-ˌēn
: a stiff transparent plastic used chiefly in molded products, foams, and sheet materials
Medical Definition
polystyrene
noun
poly·sty·rene
ˌpäl-i-ˈstī(ə)r-ˌēn
: a polymer of styrene
especially
: a rigid transparent thermoplastic that has good physical and electrical insulating properties and is used especially in molded products, foams, and sheet materials
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