moving or behaving in a way that is not regular, certain, or expected:
He drove in an erratic course down the road.
She can be very erratic; one day she is friendly and the next she'll hardly speak to you.
moving or behaving in a way that is not regular, certain, or expected:
He drove in an erratic course down the road.
She can be very erratic; one day she is friendly and the next she'll hardly speak to you.
changing suddenly and unexpectedly:
an erratic schedule
something that is erratic is not regular, certain, or organized in its movement or behaviour:
The erratic behaviour of the stock market is making investors nervous.
Stocks closed up slightly after an erratic day of trading.