1. to reach or extend beyond a normal or proper limit
2. to try to do more than one is able to do successfully
3. to defeat oneself by going too far or being too ambitious

Examples

• The company overreaches when it tries to expand into too many markets at once.
• His ambition often overreaches his abilities.
• The politician overreaches by making promises he cannot keep.
• She overreaches herself by taking on three jobs simultaneously.
• The team overreaches in the final quarter and loses the game.
• The branch overreaches the fence and hangs into the neighbor’s yard.
• His authority overreaches the boundaries set by the board.