What does elapse mean?
To elapse means to pass or go by, and it applies exclusively to time. When we say that hours, weeks, or decades have elapsed, we mean that they have slipped past without our necessarily marking the moment — which is precisely why the word carries a slightly wistful, literary flavor. Unlike casual alternatives such as "go by," elapse belongs largely to formal writing: legal documents, obituaries, scientific reports, and reflective prose all favor it when precision about duration matters. The verb is strictly intransitive, so it is always time that elapses, never a person who elapses something. Derived from Latin roots meaning "to glide away" or "slip past," it entered English in the early seventeenth century alongside related words such as lapse, collapse, and relapse, all built on the same idea of falling or gliding away. Though modest in frequency, elapse remains a durable and elegant choice whenever a writer wants to convey the quiet, unremarked passage of time.
verbTo pass or go by, said especially of time. Used only in intransitive constructions where time itself is the subject.
- (of time) to pass or go by
"Nearly a decade elapsed before the two friends met again."
"Several hours elapsed before anyone noticed the error."
"A full week must elapse between the application and the interview."
"Elapse" has spent four centuries doing one job — describing time slipping away — and it still refuses to be used for anything else.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of elapse
Elapse comes from the Latin verb labi, meaning "to glide," "slip," or "fall away." English formed it in the early seventeenth century from the prefix e- (meaning "away from") combined with this root, so the word literally suggests time "gliding away." It shares its origin with lapse, collapse, relapse, and prolapse, all of which preserve the underlying sense of slipping or falling. The word has remained remarkably stable in meaning since its first appearance, always denoting the passage of time.
Related word forms
How elapse is actually used
Elapse is formal to neutral in register, appearing more often in written than spoken English. It is strictly intransitive: time elapses; you cannot 'elapse' something. It typically takes periods of time (hours, days, years) as its subject rather than people.
Easily confused with elapse
'Lapse' means to slip, decline, or fall into an inferior state (or as a noun, a temporary error), while 'elapse' refers solely to the passage of time and is always intransitive.