Meaning

1 senses
  1. To perfection; fully, wholly.

Origin

From Scots, perhaps a rebracketing of to then eyne (“to the eyes”) or to thyn eyne (“(up)

From Scots, perhaps a rebracketing of to then eyne (“to the eyes”) or to thyn eyne (“(up) to your eyes”).

Wiktionary, CC BY-SA 4.0 · source

to the nines — meaning, examples, forms, synonyms | Krumeto