- n a unit of angular distance equal to 60 degrees
- n a measuring instrument for measuring the angular distance between celestial objects; resembles an octant
- Every navigator loves his sextant.
- In 1939 he perfected his sextant.
- The great Yankee skipper Joshua Slocum used only the simplest of navigational instrumentsa compass, a sextant and his famous "dollar clock"when he sailed his 37-ft.