Definition of 24/7 in English:

24/7

(also 24-7)

adverb

informal
  • Twenty-four hours a day, seven days a week; all the time.

    ‘you just can't afford to let things get you down, especially when you are on call 24/7’

Pronunciation

24/7

/ˌtwɛntiˌfɔr ˈsɛvən/