thunderstorm
n. countable A2 Elementary US //ˈθəndɝˌstɔɹm// UK //θˈʌndəstˌɔːm// thun·der·storm
n. a heavy rain storm with very loud noises and bright flashes of light in the sky.
n. a transient weather disturbance characterised by the presence of lightning and its associated acoustic effect, known as thunder.
The sudden thunderstorm forced us to cancel our picnic.
The heavy thunderstorm caused a brief power outage across the entire neighborhood last night.
As the atmospheric pressure dropped, a violent thunderstorm rolled across the plains, illuminating the horizon with frequent jagged bolts of lightning.
From thunder + storm.