thinking cap

== English == === Alternative forms === thinking-cap === Etymology === Probably by analogy with considering cap, which is attested from the early 17th century. === Pronunciation === (Received Pronunciation, General American) IPA(key): /ˈθɪŋkɪŋ ˌkæp/ Hyphenation: think‧ing cap === Noun === thinking cap (plural thinking caps) (humorous, idiomatic) A metaphorical state of focused thinking or concentration, invoked to encourage problem-solving. ==== Translations ==== === References === “thinking cap, n.” under “thinking, n.”, in OED Online ⁠, Oxford: Oxford University Press, September 2009. “thinking cap, n.”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.