or·bit /ˈɔrbət/ 名詞
1. Astron. The path described by a heavenly body in its periodical revolution around another body; as, the orbit of Jupiter, of the earth, of the moon.
2. An orb or ball. [Rare & Improper]
Roll the lucid orbit of an eye. --Young.
3. Anat. The cavity or socket of the skull in which the eye and its appendages are situated.
4. Zool. The skin which surrounds the eye of a bird.
n 1: the (usually elliptical) path described by one celestial
body in its revolution about another; "he plotted the
orbit of the moon" [syn: celestial orbit]
2: a particular environment or walk of life; "his social sphere
is limited"; "it was a closed area of employment"; "he's
out of my orbit" [syn: sphere, domain, area, field,
3: an area in which something acts or operates or has power or
control: "the range of a supersonic jet"; "the ambit of
municipal legislation"; "within the compass of this
article"; "within the scope of an investigation"; "outside
the reach of the law"; "in the political orbit of a world
power" [syn: scope, range, reach, compass, ambit]
4: the path of an electron around the nucleus of an atom [syn:
5: the bony cavity in the skull containing the eyeball [syn: eye
socket, cranial orbit, orbital cavity]
v : move in an orbit; "The moon orbits around the Earth"; "The
planets are orbiting the sun"; "electrons orbit the
nucleus" [syn: revolve]