To walk or move with difficulty as if you are going to fall. (Cambridge Dictionary)
To cause someone to feel shocked or surprised because of something unexpected or very unusual happening. (Cambridge Dictionary)
To reel from side to side: Totter. (Merriam – Webster)
To move on unsteadily. (Merriam – Webster)
Walk or move unsteadily, as if about to fall. (Oxford Dictionaries)
Definition of stagger.
Meaning of stagger in a sentence.