... open a the door and walk .. or run if you really wish
It can be either. Or also a preposition, or a noun. outside chance, outside wall - adjective stepped outside - adverb outside the lines - preposition the outside of the cup - noun
the ''outside''
The word 'outside' is an uncountable noun; a word for the aspect of something (The outside is shabby.)The word outside is also:a preposition (There's a patio outside the restaurant.)an adverb (You may play outside.)an adjective (We had outside help for the project.)
The outside linebacker is usually responsible for outside containment.
Answer this question… If it is warm outside, then it is not summer.
on the outside of your wrist
outside
outside
Its "incenter" will not fall outside the triangle, or outside the base of the triangle.
This is one case where the common usage in English has eliminated the proper descriptive function of a preposition. If something is "outside a building", it is actually outside "of" the building, but the word "outside" creates an adverbial clause that removes the need for the "of". "He was standing outside the building." (same case for "inside") The "outside of a building" is a noun meaning the exterior wall. "I had to repair the outside of the building."
The basic particles outside the nucleus in an atom (note "outside", not "on the outside of" ... there's a subtle difference) are electrons.
It may be a noun (the outside of a ball) adjective (outside restroom) adverb (went outside) preposition (outside the house)