What is "to round to"

Round \Round\, v. i.

1. To grow round or full; hence, to attain to fullness, completeness, or perfection.

   The queen your mother rounds apace.
   --Shak.

   So rounds he to a separate mind, From whence clear memory may begin.
   --Tennyson.

2. To go round, as a guard. [Poetic]

   They . . . nightly rounding walk.
   --Milton.

3. To go or turn round; to wheel about.
   --Tennyson.

   To round to (Naut.), to turn the head of a ship toward the wind.