adj

• Finished; ended; concluded.
• (informal, of an ongoing situation) Hopeless; irrecoverable.
  "We're keeping our marriage going for the sake of the kids, but really it's over."
• (informal) Visiting one's home or other location.
  "My sister's over for the week."
• (informal) Having an excess in a particular respect.
  "This steak is well over. (overcooked)"

adv

• (often in compounds) To a high or excessive degree; overly; see also over-.
  "I'm not over bothered about going to the party."
• Indicating repetition.
  "I lost my paper and I had to do the entire assignment over."

noun

• (cricket) A set of six legal balls bowled.
  "Jones hit four boundaries in the first over."
• (informal) Something having an excess of a particular property.
  "I went fishing but caught mostly overs."
• (gambling) A bet that a particular sporting statistic, such a points scored in a game, will be above a certain stated value.

prep

• Expressing spatial relationship or movement.
  "There was a big fire over the other side of town."
• Expressing comparison.
  "Sales are down this quarter over last."
• (mathematics) Divided by.
  "Two over six equals one over three."
• (poker) Separates the three of a kind from the pair in a full house.
  "9♦9♠9♣6♥6♠ = nines over sixes"