1 formal promise
ADJ. sacred, solemn | Hippocratic a doctor's Hippocratic oath
VERB + OATH swear, take He took an oath of allegiance to his adopted country. | break, violate
PREP. ~ of an oath of allegiance/loyalty
2 in a court of law
VERB + OATH administer Only a judge is allowed to administer the oath.
PREP. on ~ He swore on oath that he had never seen me before. | under ~ Witnesses must testify under oath.
3 swear word
QUANT. stream, string He muttered a stream of oaths.
VERB + OATH mutter, utter