Merriam-Webster's Collegiate® Dictionary, 11th Edition
ORBIT
I. noun
Etymology: Middle English, from Medieval Latin orbita, from Latin, rut, track, probably from orbis
Date: 15th century
the bony socket of the eye, orbital adjective
II. noun
Etymology: Latin orbita path, rut, orbit
Date: 1696
1. a path described by one body in its revolution about another (as by the earth about the sun or by an electron about an atomic nucleus), a circular path, a range or sphere of activity or influence , see: range orbital adjective
III. verb
Date: 1943
transitive verb to revolve in an orbit around ; circle , to send up and make revolve in an orbit , intransitive verb to travel in circles