Meaning

• In front of.

  "A hill loomed ahead of them."

• Preceding.

  "He's giving a series of concerts in London ahead of his international tour."

• In the future of.

  "Peter has a lot of work ahead of him."

• In advance of.

  "I arrived at the suite half an hour ahead of Jack."

• Having made more progress than.

  "He is far ahead of his class in math."