to (or †unto) perfection: completely, perfectly.

Literally; = after the letter at phrases 1a. Obsolete.

To the smallest detail; exactly; thoroughly. Obsolete (poetic and archaic in later use).

to the (also a) nail: to a nicety, to perfection; to the utmost. Obsolete.

Phrase. to a shaving, completely, exactly.

jam up: thoroughly, perfectly, excellently; right up to; so jam-full adj.: packed full, completely filled; jam-packed adj.: tightly packed; closely…

to the moment: with exact punctuality; (also) for the exact time required. Now rare.

figurative. to a (fine) point: to a precise form; completely.