To exert downward pressure or force. The wind began to bear down on the small boat, making it difficult to steer.
To approach or move towards something with determination or force. The storm clouds began to bear down on the city, signaling an impending downpour.
To concentrate or focus one's efforts or attention on something. With the deadline approaching, she had to bear down and finish the project.
To apply pressure or effort in childbirth to help deliver the baby. The doctor instructed her to bear down during the contractions.