Meaning of the word solemnly in English

What does solemnly mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

solemnly

US /ˈsɑː.ləm.li/
UK /ˈsɑː.ləm.li/

Adverb

1.

seriously and without any humor:

Example:
I solemnly promise to tell the truth.
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