1. formidable extremely impressive in strength or excellence
  2. formatting the organization of information according to preset specifications (usually for computer processing)
  3. warm-toned used of music
  4. formaldehyde a colorless poisonous gas; made by the oxidation of methanol
  5. formic acid a colorless pungent fuming vesicatory liquid acid HCOOH found naturally in ants and many plants or made catalytically from carbon monoxide and steam; used in finishing textiles and paper and in the manufacture of insecticides and fumigants
  6. formalin a 10% solution of formaldehyde in water
  7. dormant inactive but capable of becoming active
  8. from head to toe at all points from head to foot
  9. worm-eaten infested with or damaged (as if eaten) by worms
  10. from the heart very sincerely
  11. formative minimal language unit that has a syntactic function
  12. formality a requirement of etiquette or custom
  13. formation the act of establishing or creating something
  14. Formosan the Austronesian languages spoken on Formosa
  15. formulated devised; developed according to an orderly plan
  16. formidability impressive difficulty
  17. formidably in a formidable manner
  18. prima donna a vain and temperamental person
  19. formalized given formal standing or endorsement
  20. Formicariidae antbirds