What does SMOOTH mean?

adjective

1. having a surface free from roughness or bumps or ridges or irregularities“smooth skin”
2. smoothly agreeable and courteous with a degree of sophistication“he was too politic to quarrel with so important a personage”
3. of the margin of a leaf shape; not broken up into teeth
4. smooth and unconstrained in movement“a long, smooth stride”
5. (music) without breaks between notes; smooth and connected“a legato passage”
6. of motion that runs or flows or proceeds without jolts or turbulence“a smooth ride”
7. lacking obstructions or difficulties“the bill's path through the legislature was smooth and orderly”
8. (of a body of water) free from disturbance by heavy waves“a ribbon of sand between the angry sea and the placid bay”