What does «pulquérrimo» mean in Spanish?

Irregular superlative of neat.
Extremely neat: very neat, very beautiful or good-looking.

Examples of use in Spanish: "su aspecto pulquérrimo, impecable".

"de este ilustre personaje se sabe que era muy limpio, esmerado, pulquérrimo (...), era amigo del jabón de suave perfume, esclavo del aseo".
Extremely neat: very delicate and careful in his conduct.

Examples of use in Spanish: "hombre pulquérrimo y atento".