[FIRST PERSON SINGULAR]
I - Used by a speaker to refer to himself or herself as the object of a verb or preposition:
do you understand me?
I.I - Used after the verb ‘to be’ and after ‘than’ or ‘as’:
hi, it’s me
you have more than me
I.II - INFORMAL & West Indian I or my:
I’ll get me coat
me can come an go as me please
I.III - North American INFORMAL To or for myself:
I’ve got me a job
II - INFORMAL Used in exclamations:
dear me!
Origin
Old English mē, accusative and dative of I2, of Germanic origin; related to Dutch mij, German mir (dative), from an Indo-European root shared by Latin me, Greek (e)me, and Sanskrit mā.