Whilst meaning “Whilst” is a subordinating conjunction used to express that something occurred at the same time as something else (e.g., “I slept whilst he drove”) or to indicate a contrast (e.g., “I play baseball, whilst my twin brother prefers football”). “Whilst” is considered more formal than “while,” and is typically used in British English, although “while” is more popular in both American and British dialects. Examples: Using whilst in a sentence Let’s watch ... Whilst and while are two words with identical meanings—usually. But you can’t always use whilst instead of while. Typically, Brits use whilst and Americans use while. That’s the main difference. When used as a conjunction or an adverb, while and whilst are interchangeable: There wasn’t much Stanley could do while he waited. Mainly British → another word for while (sense 1), while (sense 2), while (sense 3), while.... Click for English pronunciations, examples sentences, video. WHILST definition: 1. during the time that, or at the same time as: 2. despite the fact that; although: 3. compared…. Learn more.