1. The act of reporting your presence (as at an airport or a hotel)

1. Announce one's arrival, e.g. at hotels or airports
   - sign in

Derived forms: check-ins, checking in, checked in, checks in

Type of: arrival, report

Antonym: check out

Encyclopedia: Check in

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• cardio-
• cardiogenic shock
• cardiogram
• cardiograph
• cardiographic
• cardiography
• cardioid
• cardioid microphone
• cardiologic
• cardiologist
• cardiology
• cardiomegaly
• cardiomyopathy
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• cardiopulmonary
• cardiopulmonary arrest
• cardiopulmonary exercise
• cardiopulmonary resuscitation
• cardiorespiratory
• cardiospasm
• Cardiospermum
• Cardiospermum grandiflorum
• Cardiospermum halicacabum
• cardiovascular