sunspot

noun sun·spot \ -ˌspät \
Updated on: 3 Dec 2017

Definition of sunspot

: any of the dark spots that appear at times on the sun's surface and are usually visible only through a telescope

Recent Examples of sunspot from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sunspot.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sunspot

1868


SUNSPOT Defined for English Language Learners

sunspot

noun

Definition of sunspot for English Language Learners

  • astronomy : a dark spot that sometimes appears on the surface of the sun



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