having or emitting a high-pitched and sharp tone or tones ; "a shrill whistle"; "a shrill gaiety"
(of a musical note) raised in pitch by one chromatic semitone; "C sharp"
having or demonstrating ability to recognize or draw fine distinctions; "an acute observer of politics and politicians"; "incisive comments"; "icy knifelike reasoning"; "as sharp and incisive as the stroke of a fang"; "penetrating insight"; "frequent penetrative observations"
harsh; "sharp criticism"; "a sharp-worded exchange"; "a tart remark"
ending in a sharp point
a long thin sewing needle with a sharp point
marked by practical hardheaded intelligence; "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow"
a musical notation indicating one half step higher than the note named