1. Off work, but available to provide a service if requested
   "I'm on call for my patients 4 days a week and every fourth weekend"

Encyclopedia: On call

• boat bug
• boat club
• boat deck
• boat hook
• boat paddle
• boat racing
• boat train
• boat whistle
• boat-billed heron
• boat-race
• boat-shaped
• boatbill
• boatbuilder
• boater
• boathouse
• boating
• boatload
• boatman
• boatmanship
• boatswain
• boatswain bird
• boatswain's chair
• boatyard
• bob
• bob about