Definition of thunderhead in English:

thunderhead

Syllabification: thun·der·head
Pronunciation: /ˈTHəndərˌhed
 
/

noun

A rounded, projecting head of a cumulus cloud, which portends a thunderstorm.
More example sentences
  • But Ben recognized the thunderheads, the big cumulus clouds, that were drifting our way.
  • As air rises in a large cumulonimbus or thunderhead cloud condensation occurs and all three forms of water are present.
  • We'll follow mountain-lion tracks and watch from remote plateaus as distant puffs of cloud build into towering thunderheads.

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