noun, verb ·Rare ·Advanced level

Definitions

Noun

1. 1
   An unbroken or nearly unbroken cloud layer below the point of observation. countable, uncountable

   "Undercast is common on Mount Washington."

2. 2
   An air-passage crossing a road in a mine by means of an airtight box or channel beneath it. countable, uncountable

Verb

1. 1
   To allocate the parts in (a play or film) to insufficiently skilled actors.
2. 2
   To throw under or beneath.

Antonyms

All antonyms

overcast

Example

More examples

"Undercast is common on Mount Washington."

Etymology

From Middle English undercasten, equivalent to under- + cast.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.