What does aloft mean?
The definition of aloft
A*loft”, adv.
Etym: [Pref. a- + loft, which properly meant air. See Loft.]

1 On high; in the air; high above the ground. “He steers his flight aloft.” Milton.
2 (Naut.)
In the top; at the mast head, or on the higher yards or rigging; overhead; hence (Fig. and Colloq.), in or to heaven.

A*loft”, prep.
Above; on top of. [Obs.] Fresh waters run aloft the sea. Holland.