1. In a flat manner; evenly; horizontally; without spirit; dully; frigidly.
He that does the works of religion slowly, flatly, and without appetite. --Jer. Taylor.
2. peremptorily; positively; plainly; forthrightly. “He flatly refused his aid.”
adv : in an unqualified manner; "he flatly denied the charges"
[syn: categorically, unconditionally]