Function: adjective
Date: 1853
: being in effect, continuing, or lasting 24 hours a day : CONSTANT < around-the-clock surveillance>
Function: adjective
Date: 1853
: being in effect, continuing, or lasting 24 hours a day : CONSTANT < around-the-clock surveillance>
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012