I. adverb
1.
beyond this -- used as an intensive to stress the comparative degree
in spite of her protest he went yet faster
Synonyms: even, still
2.
at some future time
just wait, we'll get there yet
Synonyms: eventually, finally, someday, sometime, somewhen, sooner or later, ultimately
Idioms: after a while, in due course, in the course of time
3.
Synonyms: also 2, additionally, along, as well, besides, furthermore, likewise, more, moreover, too
4.
Synonyms: hitherto 1, as yet, earlier, so far, thus far
5.
Synonyms: however , after all, howbeit, nevertheless, nonetheless, notwithstanding, still, still and all, though, withal
II. conjunction
Synonyms: only , but, except, however, save