A mild expression of surprise, annoyance, anger, disappointment, etc. (A minced oath for "Jesus.") Jeez, Tom, don't you think you could have warned me before you turned on the sprinklers? Oh, jeez, not again! That's the third time this month that the car battery has died. Jeez, you scared me! I didn't think anyone was home.
exclam. Jesus! (Uttered as a euphemistic oath.) Jeez! I did it again!