Definitions
Important, severe, or not joking.
Used in a sentence
“deadly serious”
“It was a surprise to see the captain, who had always seemed so serious, laugh so heartily.”
“This is a serious problem. We'll need our best experts.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Not joking”7 letters
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