You are my one hope

My grammar book says I can say:

-You’re my one hope.

without giving any explanation.

Does it mean?:

  1. You’re my only hope.
  2. You’re one of my hopes.

It means that you are my only hope.[YSaerTTEW443543]

TOEIC listening, question-response: Which day is the safety inspection?[YSaerTTEW443543]

It can be only (2) though the sentence does not seem to be natural. I doubt whether ‘one’ can mean ‘only’.

The sentence is natural, and Torsten is correct about the meaning.

Thank you~