What is the meaning of baffle?

noun

• A flat plate that controls or directs the flow of fluid or energy.
  • synonyms: baffle board

verb

• Be a mystery or bewildering to.
  • usage: "This beats me"; "Got me-I don't know the answer"; "a vexing problem"; "This question really stuck me"
  • synonyms: perplex, vex, stick, get, puzzle, mystify, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound
• Hinder or prevent (the efforts, plans, or desires) of.
  • usage: "What ultimately frustrated every challenger was Ruth's amazing September surge"; "foil your opponent"
  • synonyms: thwart, queer, spoil, scotch, foil, cross, frustrate, bilk
• Check the emission of (sound. ).
  • synonyms: regulate