Definition of "ICU"

(medicine) Initialism of intensive care unit.  examples

(transport) Initialism of intersection capacity utilization: a measure of the capacity of a roadway intersection.  examples

Initialism of International Christian University, a private university located in Tokyo.  examples

Initialism of international components for Unicode: software libraries supporting internationalization.  examples

(Internet slang, text messaging) Abbreviation of I see you.