noun

• a drawback or difficulty that is not readily evident
  "it sounds good but what's the catch?"
• the quantity that was caught
  "the catch was only 10 fish"
• a person regarded as a good matrimonial prospect
• anything that is caught (especially if it is worth catching)
  "he shared his catch with the others"

verb

• discover or come upon accidentally, suddenly, or unexpectedly; catch somebody doing something or in a certain state
  "She caught her son eating candy"
• perceive with the senses quickly, suddenly, or momentarily
  "I caught the aroma of coffee"
• reach with a blow or hit in a particular spot
  "the rock caught her in the back of the head"
• take hold of so as to seize or restrain or stop the motion of
  "Catch the ball!"