B2 certain and without any doubt: [+ (that)] Are you positive (that) you saw me switch the iron off? "Are you sure it's okay for me to use your mother's car?" "Positive." "It was him - I saw him take it." "Are you positive about that?"
› (of a number or amount) more than zero: Two is a positive number.
positively › react/respond positively to sth Financial markets reacted positively to the news.