silicone

noun

sil·​i·​cone ˈsi-lə-ˌkōn 

: any of various polymeric organic silicon compounds obtained as oils, greases, or plastics and used especially for water-resistant and heat-resistant lubricants, varnishes, binders, and electric insulators

Examples of silicone in a Sentence

a prosthesis made of silicone

Recent Examples on the Web

From silicone grips that help prevent slipping to stretchy bands that move with you, these bras are made for off-the-shoulder tops, strapless dresses, halter tops, and more. — Jeaneen Russell, PEOPLE, 20 Aug. 2026

The silicone sleeve on this 32-ounce glass bottle helps prevent it from cracks and chips, and the time markings remind you to drink water all day to stay hydrated. — Bestreviews, Chicago Tribune, 19 Aug. 2026

While silicone storage containers aren't known for their super tight seals, I was impressed by how much squeezing and shaking these could withstand without leaking. — Wilder Davies, Bon Appetit Magazine, 19 Aug. 2026

Not only should the primer’s base match that of your foundation (to avoid pilling and patchiness), but water- and silicone-based primers can perform very differently. — Jenny Berg, InStyle, 19 Aug. 2026

Word History

Etymology

silicon + -one

First Known Use

1943, in the meaning defined above

Phrases Containing silicone

• silicone rubber

Rhymes for silicone

• acetone
• anglophone
• baritone
• bourguignon
• buspirone
• chaperon
• chaperone
• cobblestone
• collarbone
• cornerstone
• cortisone
• dictaphone

Kids Definition

silicone

noun

sil·​i·​cone ˈsil-ə-ˌkōn 

: any of various silicon compounds that contain carbon and hydrogen, are obtained as oily or greasy substances or plastics, and are used especially for water-resistant and heat-resistant lubricants and varnishes

Medical Definition

silicone

noun

sil·​i·​cone ˈsil-ə-ˌkōn 

: any of various polymeric organic silicon compounds which are obtained as oils, greases, or plastics and some of which have been used as surgical implants