1. In an unqualified manner
   "he flatly denied the charges"
   - categorically, unconditionally

See also: flat

• open season
• open secret
• open sesame
• open shop
• open sight
• open society
• Open University
• open up
• open weave
• open-air
• open-air market
• open-air marketplace
• open-and-shut
• open-angle glaucoma
• open-class word
• open-collared
• open-door policy
• open-end credit
• open-end fund
• open-end investment company
• workflow
• workforce
• workhorse
• workhouse
• working