1. To; against. She, poor bird, as all forlorn, Leaned her breast uptill a thorn.

What is the meaning of Uptill?

: during the time or period before Up till now, everything has gone very well.

Is up till now correct?

The correct phrase is 'til now. " 'Til " (quotes spaced out so you can see the apostrophe easily) is a contraction for "until." This is synonymous to 'til now. The "up" doesn't really mean anything and is an artifact of colloquialism.