Definitions: (1) quick, acute, or penetrating in intellectual perception; clever; shrewd; sharp-minded; (2) showing a keen awareness; attentive; vigilant; alert; (3) extremely sensitive to the needs or wants of others; (4) full of activity or energy; brisk; active; vigorous; (5) attractively dressed or groomed; good-looking; handsome; beautiful; (6) clearly defined; distinct, unobstructed

• Tolerance, compromise, understanding, acceptance, patience – I want those all to be very sharp tools in my shed. — Thomas DeCarlo Callaway Burton [aka CeeLo Green] (1975-) American songwriter & singer
• God answers sharp and sudden on some prayers, and thrusts the thing we have prayed for in our face – a gauntlet with a gift in it. — Elizabeth Barrett Browning (1806–1861) English poet