He became serious when he was asked about the economy.
A serious amount of money.
An example of serious is wearing a full suit to a casual dinner; serious attire.
An example of serious is a person who doesn't smile or laugh easily; serious person.
An example of serious is sky diving; serious sport.
A serious golfer.
A serious novel.
After all these years, we're finally getting serious attention.
A serious person.
A serious problem.
A serious wound.
Origin of serious
- Middle English from Old French serieux from Late Latin sēriōsus from Latin sērius
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English seryows, from Old French serieux, from Medieval Latin sÄ“riÅsus, an extension of Latin sÄ“rius (“grave, earnest, serious"), from Proto-Indo-European *swÄ“r- (“heavy"). Cognate with German schwer (“heavy, difficult, severe"), Old English swÇ£r (“heavy, grave, grievous"). More at swear, sweer.