What is the meaning of upset?

noun

• An unhappy and worried mental state.
  • usage: "there was too much anger and disturbance"; "she didn't realize the upset she caused me"
  • synonyms: disturbance, perturbation
• The act of disturbing the mind or body.
  • usage: "his carelessness could have caused an ecological upset"; "she was unprepared for this sudden overthrow of their normal way of living"
  • synonyms: derangement, overthrow
• A physical condition in which there is a disturbance of normal functioning.
  • usage: "the doctor prescribed some medicine for the disorder"; "everyone gets stomach upsets from time to time"
  • synonyms: disorder
• A tool used to thicken or spread metal (the end of a bar or a rivet etc.) by forging or hammering or swaging.
  • synonyms: swage
• The act of upsetting something.
  • usage: "he was badly bruised by the upset of his sled at a high speed"
  • synonyms: overturn, turnover
• An improbable and unexpected victory.
  • usage: "the biggest upset since David beat Goliath"
  • synonyms: overturn

verb

• Disturb the balance or stability of.
  • usage: "The hostile talks upset the peaceful relations between the two countries"
• Cause to lose one's composure.
  • synonyms: discompose, untune, disconcert, discomfit
• Move deeply.
  • usage: "This book upset me"; "A troubling thought"
  • synonyms: disturb, trouble
• Cause to overturn from an upright or normal position.
  • usage: "The cat knocked over the flower vase"; "the clumsy customer turned over the vase"; "he tumped over his beer"
  • synonyms: overturn, tip over, turn over, knock over, bowl over, tump over
• Form metals with a swage.
  • synonyms: swage
• Defeat suddenly and unexpectedly.
  • usage: "The foreign team upset the local team"

adjective

• Afflicted with or marked by anxious uneasiness or trouble or grief.
  • usage: "too upset to say anything"; "spent many disquieted moments"; "distressed about her son's leaving home"; "lapsed into disturbed sleep"; "worried parents"; "a worried frown"; "one last worried check of the sleeping children"
  • synonyms: disquieted, distressed, disturbed, worried
• Thrown into a state of disarray or confusion.
  • usage: "troops fleeing in broken ranks"; "a confused mass of papers on the desk"; "the small disordered room"; "with everything so upset"
  • synonyms: broken, confused, disordered
• Used of an unexpected defeat of a team favored to win.
  • usage: "the Bills' upset victory over the Houston Oilers"
• Mildly physically distressed.
  • usage: "an upset stomach"
• Having been turned so that the bottom is no longer the bottom.
  • usage: "an overturned car"; "the upset pitcher of milk"; "sat on an upturned bucket"
  • synonyms: overturned, upturned