As a noun:
* The ante was upped significantly when the new competitor entered the market. (Meaning: The stakes were raised.)
* She put up a hefty ante to win the auction. (Meaning: She bid a large amount of money.)
* The ante in this game is your reputation. (Meaning: What is at stake is your reputation.)
As a verb:
* The company decided to ante up their investment in research and development. (Meaning: They increased their investment.)
* He anteed his entire savings on a single bet. (Meaning: He risked all his savings.)
* We need to ante up if we want to stay competitive. (Meaning: We need to increase our efforts or contributions.)
As an adjective:
* The antebellum South was a time of great social change. (Meaning: The South before the Civil War.)
* This antechamber serves as a waiting area. (Meaning: A room leading to a larger room.)
Remember that "ante" is a relatively uncommon word, and its meaning depends on the context.