1. to make a solemn promise or oath
2. to use profane or offensive language
3. to state or affirm solemnly and formally as true
Usage: legal

Examples

• I swear to tell the truth in court.
• She made him swear to keep the secret.
• He tends to swear when he’s frustrated.
• The witness will swear on the Bible.
• I swear I didn’t break the vase.
• Please don’t swear in front of the children.
• The new citizens will swear allegiance to the country.