1. 
[syn: around-the-clock, day-and-night, nonstop, round-the-clock]
The Collaborative International Dictionary of English v.0.48:
around-the-clock \around-the-clock\ adj.
   1. 1 proceeding without interruption for twenty four hours
      every day. around-the-clock nursing care
   Syn: day-and-night, nonstop, round-the-clock, twenty four
        hours a day.
        [WordNet 1.5]
WordNet (r) 3.0 (2006):
around-the-clock
    adj 1: at all times; "around-the-clock nursing care" [syn:
           around-the-clock, day-and-night, nonstop, round-
           the-clock]