2. (Law)

Defn: To give evidence on oath; as, to swear to the truth of a statement; he swore against the prisoner.

3. To make an appeal to God in an irreverant manner; to use the name of God or sacred things profanely; to call upon God in imprecation; to curse. [I] swore little; diced not above seven times a week. Shak. To swear by, to place great confidence in a person or thing; to trust implicitly as an authority. "I simply meant to ask if you are one of those who swear by Lord Verulam." Miss Edgeworth. — To swear off, to make a solemn vow, or a serious resolution, to abstain from something; as, to swear off smoking. [Slang]

SWEAR
Swear, v. t.

1. To utter or affirm with a solemn appeal to God for the truth of the declaration; to make (a promise, threat, or resolve) under oath. Swear unto me here by God, that thou wilt not deal falsely with me. Gen. xxi. 23. He swore consent to your succession. Shak.

2. (Law)

Defn: To put to an oath; to cause to take an oath; to administer an oath to; — ofetn followed by in or into; as, to swear witnesses; to swear a jury; to swear in an officer; he was sworn into office.

3. To declare or charge upon oath; as, he swore treason against his friend. Johnson.

4. To appeal to by an oath. Now, by Apollo, king, Thou swear'st thy gods in vain. Shak. To swear the peace against one, to make oath that one is under the actual fear of death or bodily harm from the person, in which case the person must find sureties that he will keep the peace.

SWEARER
Swear"er, n.