1 (pl. of I(2)) used by and with reference to more than one person speaking or writing, or one such person and one or more associated persons.
2 used for or by a royal person in a proclamation etc. and by a writer or editor in a formal context.
3 people in general (cf. ONE pron. 2).
4 colloq. = I(2) (give us a chance).
5 colloq. (often implying condescension) you (how are we feeling today?).
Etymology: OE f. Gmc
Useful english dictionary. 2012.