I. or ‧ bit ‧ al 1 /ˈɔːbɪtl $ ˈɔːr-/ BrE AmE adjective
1 . relating to the orbit of one object around another:
the Earth’s orbital path
2 . British English an orbital road goes around a large city:
the M25, London’s orbital motorway
II. orbital 2 BrE AmE noun [countable] British English
a road that goes around a large city to keep the traffic away from the centre SYN ring road