overserious
1. [ adjective ] excessively serious
Related terms: serious
Similar spelling:   overseer
  overcurious
  overcredulous
  overzealous
  overjealous
  overseas
  oversolicitous
  overgenerous
  overcautious
  overside
  oversewn
  overseas_cap
  overstress
  oversize
  overshoe
  oversight
  oversized
  oversexed
  oversensitive
  overskirt
  oversleep
  overspill
  overstate