1. to move in an unpredictable, irregular, or inconsistent manner without a clear pattern or direction
The injured bird moved erratically across the floor.
O pássaro ferido movia-se de forma errática pelo chão.
2. to move with sudden, unexpected changes in direction or speed
The car moved erratically on the icy road.
O carro movia-se de forma errática na estrada gelada.