I don't think he means for you to find anything in the definition of ambiguity :)
In what way are you ambiguous in your life? Do you fit in - do you do things differently than others - do others sometimes say they don't get you? etc etc. Do you say one thing but almost mean another - do you feel your life is "unclear" or "unfocused"?
Ask yourself those kinds of questions, do a brainstorming tree on paper, follow your thoughts and maybe something a little more personal will come to you?
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