prep

• (obsolete outside Scotland) Outside of.
  "Away but the hoose and tell me whae's there."

adv

• (chiefly literary or poetic) Merely, only, just, no more than
  "Christmas comes but once a year, so we can but wait till then."
• (Australia, Geordie, Scotland, conjunctive) Though, however.
  "I'll have to go home early but."

conj

• (colloquial) Used at the beginning of a sentence to express opposition to a remark.
  "But I never said you could do that!"
• (colloquial) Used to link an interjection to the following remark as an intensifier.
  "Wow! But that's amazing!"
• (archaic) Without it also being the case that; unless that (introducing a necessary concomitant).
  "It never rains but it pours"
• (obsolete) Except with; unless with; without.
  "This man unable to manage his own happineſſe, grew ſo inſolent that he could not go, but either ſpurning his equals, or trampling on his inferiours."

noun

• (Scotland) The outer room of a small two-room cottage.