What is the meaning of blunder?

noun

• An embarrassing mistake.
  • synonyms: blooper, bloomer, bungle, pratfall, foul-up, fuckup, flub, botch, boner, boo-boo

verb

• Commit a faux pas or a fault or make a serious mistake.
  • usage: "I blundered during the job interview"
  • synonyms: drop the ball, sin, boob, goof
• Make one's way clumsily or blindly.
  • usage: "He fumbled towards the door"
  • synonyms: fumble
• Utter impulsively.
  • usage: "He blurted out the secret"; "He blundered his stupid ideas"
  • synonyms: blurt out, blurt, blunder out, ejaculate