1. used to introduce a statement that contrasts with or contradicts what has just been said
2. used to introduce an exception or limitation

1. except for; other than

1. only; just; merely

Examples

• I wanted to go, but I was too tired.
• She’s smart but lazy.
• Everyone but Tom came to the party.
• There’s nothing but trouble ahead.
• We can but try our best.
• It’s but a small problem.
• All but one student passed the test.