sharper

1. Terminating in a point or edge, especially one that can cut easily; not obtuse or rounded.

   A face with sharp features

2. Intelligent.

   My nephew is a sharp lad; he can count to 100 in six languages, and he's only five years old.

3. Higher than usual by one semitone (denoted by the symbol ♯ after the name of the note).
4. Higher in pitch than required.

   The orchestra's third violin several times was sharp about an eighth of a tone.

5. Having an intense, acrid flavour.

   Milly couldn't stand sharp cheeses when she was pregnant, because they made her nauseated.

6. Sudden and intense.

   A pregnant woman during labor normally experiences a number of sharp contractions.

7. Illegal or dishonest.

   Michael had a number of sharp ventures that he kept off the books.

8. Keenly or unduly attentive to one's own interests; shrewd.

   a sharp dealer;  a sharp customer

9. Exact, precise, accurate; keen.

   You'll need sharp aim to make that shot.

10. Offensive, critical, or acrimonious.

    When the two rivals met, first there were sharp words, and then a fight broke out.

11. Stylish or attractive.

    You look so sharp in that tuxedo!

12. Observant; alert; acute.

    Keep a sharp watch on the prisoners. I don't want them to escape!

13. Forming a small angle; especially, forming an angle of less than ninety degrees.

    Drive down Main for three quarters of a mile, then make a sharp right turn onto Pine.

14. Steep; precipitous; abrupt.

    a sharp ascent or descent; a sharp turn or curve

15. (of a statement) Said of as extreme a value as possible.

    Sure, any planar graph can be five-colored. But that result is not sharp: in fact, any planar graph can be four-colored. That is sharp: the same can't be said for any lower number.

16. Tactical; risky.
17. Piercing; keen; severe; painful.

    a sharp pain; the sharp and frosty winter air

18. Eager or keen in pursuit; impatient for gratification.

    a sharp appetite

19. Fierce; ardent; fiery; violent; impetuous.
20. Composed of hard, angular grains; gritty.
21. Uttered in a whisper, or with the breath alone; aspirated; unvoiced.
22. Hungry.

noun

A swindler; a cheat; a professional gambler who makes his living by cheating.