What is Only ?
Only is (adj) without others of the same type Don’t break it it’s the only one I’ve got. (adv) 1. with no one or nothing else We’ve only got ten pounds between us. Only an accountant can deal with this problem. This lift is for staff only. 2. as recently as We saw her only last week. Only yesterday the bank phoned for information. (conj) but, except I like my mother-in-law very much, only I don’t want to see her every day of the week. only just almost not only too very much
source: Easier English, Student Dictionary Upper Intermediate Level