used by the person speaking or writing to refer to himself or herself:
I moved to this city six years ago.
I'm not late again, am I?
My husband and I enjoy going to the theatre.
! Do not say 'taller than I', 'younger than I', 'better than I' etc. Saytaller than me, younger than me, better than meortaller than I am, younger than I am, better than I ametc.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.