Meaning

• To change sides; to cross over to work for the opposition.

  "You argued well in court but your firm doesn't pay its lawyers well, so why don't you come across to ours?"

• To give an appearance or impression; to project a certain image.

  "A business suit and briefcase help her to come across as the competent professional she is."

• To find, usually by accident.

  "In the meadow he came across a rare flower."

• To produce what was desired; come up with the goods.