on-callBrE /ˌɒn ˈkɔːl/ 🔊NAmE /ˌɑːn ˈkɔːl/ 🔊, /ˌɔːn ˈkɔːl/ 🔊 [only before noun] (especially
NAmE) (of a doctor, police officer, etc. 医生、警察等) available for work if necessary, especially in an emergency (尤指紧急情况下)随叫随到的◆on-call doctors随时应诊的医生 ➡ see also call noun