Definition of "dapper"

This entrance is through a little courtyard, in which is the stable and coach-house combined, where Madame Perinere, a lady who paints the magic word "Modes" beneath her name on the door-post of number seventeen, keeps the dapper little cart and pony which carry her bonnets to the farthest corner of Paris.

1892, Henry Seton Merriman, The Slave Of The Lamp

Going down the street, you would meet a typical commercial traveller, dapper and alert.

1917, P. G. Wodehouse, The Man With Two Left Feet