- lasting a long time; lengthy: Regular or prolonged absence from school without a valid reason may result in the absentee being barred from examinations.
- lengthened or extended in time or space:Technological innovations in the ICU have led to artificially prolonged life, with associated costs.Abnormally shortened or prolonged telomeres are a hallmark of cancer.
- the simple past tense and past participle of prolong.
