911 /ˌnaɪ̯n wən ˈwən/noun 3verb 1forms 3 noun3 •(US, Canada) Emergency services; emergency service personnel.911 is sending an ambulance. •(US, informal) An emergency. •(US, informal) An emergency phone call. verb1 •(US, informal) To call emergency services.London hairstylist Rick Haylor for the John Frieda Salon—the man Nicole Kidman 911s when she wants her curly mop to lie down and look glamorous—tells you how to go straight. — 1997 forms911ed · 911ing · 911s
