how would you define "virtuoso playing"?

how would you define "virtuoso playing"? How would you define happiness? How would you define the terms system? how do you define success How do you define cactus hou exactly would you define eccentricity意思 How will you define the word BRIBERY? how do you define a love poem? how do you define authentic leadership? how do you define the word “ugly” How do you define employee morale? How do you define global competitivenss