verb

• (informal) To strike heavily.
  "The thugs kept bashing the cowering victim."
• (informal) To collide; used with into or together.
  "Don't bash into me with that shopping trolley."
• (transitive, informal) To criticize harshly.
  "He bashed my ideas."

noun

• (informal) A forceful blow or impact.
  "He got a bash on the head."
• (informal) A large party; a gala event.
  "They had a big bash to celebrate their tenth anniversary."
• (UK, informal) An attempt at doing something.
  "give something a bash"

verb

• (obsolete, transitive) To abash (make ashamed)
  "His countenance was bold and bashed not."

name

• (computing) The Free Software Foundation's command interpreter (the "shell") for UNIX-like operating systems.
  "Bash stands for “Bourne-again shell”."
• (computer languages) The scripting language provided with this interpreter.