region,
part a knowledge domain that you are interested in or are communicating about; "it was a limited realm of discourse"; "here we enter the region of opinion"; "the realm of the occult"
surface the outer boundary of an artifact or a material layer constituting or resembling such a boundary; "there is a special cleaner for these surfaces"; "the cloth had a pattern of red dots on a white surface"
Adjective
outside -
relating to or being on or near the outer side or limit; "an outside margin"
inside away from the outer edge; "an inner lahne"; "the inside lane"
external happening or arising or located outside or beyond some limits or especially surface; "the external auditory canal"; "external pressures"
after-school outside regular school hours; "a special after-school class"
extracurricular outside the regular duties of your job or profession
extracurricular outside the regular duties of your job or profession
outside -
very unlikely; "an outside chance"; "a remote possibility"; "a remote contingency"
unlikely has little chance of being the case or coming about; "an unlikely story"; "an unlikely candidate for reelection"; "a butcher is unlikely to preach vegetarianism"
outside -
originating or belonging beyond some bounds:"the outside world"; "outside interests"; "an outside job"
outside -
on or toward an outer edge; "an outer lane"; "the outside lane"
outside -
leading to or from the outside; "an outside door"
outside -
functioning outside the boundaries or precincts of an organized unit; "extramural hospital care and treatment"; "extramural studies"
Adverb
outside -
outside a building; "in summer we play outside"