What is the meaning of pick up?

verb

• Take and lift upward.
  • synonyms: lift up, gather up
• Take up by hand.
  • usage: "He picked up the book and started to read"
• Give a passenger or a hitchhiker a lift.
  • usage: "We picked up a hitchhiker on the highway"
• Gather or collect.
  • usage: "You can get the results on Monday"; "She picked up the children at the day care center"; "They pick up our trash twice a week"
  • synonyms: collect, gather up, call for
• Get to know or become aware of, usually accidentally.
  • usage: "I learned that she has two grown-up children"; "I see that you have been promoted"
  • synonyms: learn, hear, get word, get wind, find out, get a line, discover, see
• Get in addition, as an increase.
  • usage: "The candidate picked up thousands of votes after his visit to the nursing home"
• Take into custody.
  • usage: "the police nabbed the suspected criminals"
  • synonyms: collar, nail, apprehend, arrest, nab, cop
• Buy casually or spontaneously.
  • usage: "I picked up some food for a snack"
• Register (perceptual input. )
  • usage: "pick up a signal"
  • synonyms: receive
• Lift out or reflect from a background.
  • usage: "The scarf picks up the color of the skirt"; "His eyes picked up his smile"
• Meet someone for sexual purposes.
  • usage: "he always tries to pick up girls in bars"
• Fill with high spirits; fill with optimism.
  • usage: "Music can uplift your spirits"
  • synonyms: elate, lift up, uplift, intoxicate
• Improve significantly; go from bad to good.
  • usage: "Her performance in school picked up"
  • synonyms: turn around
• Perceive with the senses quickly, suddenly, or momentarily.
  • usage: "I caught the aroma of coffee"; "He caught the allusion in her glance"; "ears open to catch every sound"; "The dog picked up the scent"; "Catch a glimpse"
  • synonyms: catch
• Eat by pecking at, like a bird.
  • synonyms: peck
• Gain or regain energy.
  • usage: "I picked up after a nap"
  • synonyms: perk up, perk, percolate, gain vigor