Definition of "but"
Without, apart from, except.
(conjunctive) Though, however.
Except (for), excluding. Preceded by a negation.
On the contrary, but rather (introducing a word or clause that contrasts with or contradicts the preceding clause or sentence without the not).
However, although, nevertheless (implies that the following clause is contrary to prior belief or contrasts with or contradicts the preceding clause or sentence).
Except that (introducing a subordinate clause which qualifies a negative statement); also, with omission of the subject of the subordinate clause, acting as a negative relative, "except one that", "except such that".
Without it also being the case that; unless that (introducing a necessary concomitant).
An instance or example of using the word "but".
The outer room of a small two-room cottage.