1. a hypothetical force formerly held to pervade all nature and to manifest itself in magnetism, mesmerism, chemical action, etc.

  1. on demand.
  2. outside diameter.
  3. outside dimensions.
  4. overdraft.
  5. overdrawn.

interjection Archaic.

  1. a shortened form of “God” (used in euphemistically altered oaths).

noun, plural ODs or OD’s.

  1. an overdose of a drug, especially a fatal one.
  2. a person who has taken an overdose of a drug, especially one who has become seriously ill or has died from such an overdose.

verb (used without object), OD’d or ODed or OD’ed, OD’ing or OD·ing.

  1. to take an overdose of a drug.
  2. to die from an an overdose of a drug.
  3. to have or experience an excessive amount or degree of something.

  1. officer of the day.
  2. Old Dutch.
  3. Ordnance Department.
  4. outside diameter.

  1. Old Dutch.

  1. (in prescriptions) the right eye.

  1. olive drab.
  2. on demand.
  3. outside diameter.

  1. (in prescriptions) the right eye.

  1. Doctor of Optometry.
  2. officer of the day.
  3. Old Dutch.
  4. (of a military uniform) olive drab.
  5. ordinary seaman.
  6. outside diameter.
  7. overdraft.
  8. overdrawn.


  1. archaic a hypothetical force formerly thought to be responsible for many natural phenomena, such as magnetism, light, and hypnotism


  1. euphemistic (used in mild oaths) an archaic word for God


  1. an overdose of a drug

verb OD’s, OD’ing or OD’d

  1. (intr) to take an overdose of a drug

abbreviation for

  1. Officer of the Day
  2. Old Dutch
  3. ordnance datum
  4. outside diameter
  5. Also: o.d. military olive drab
  6. Also: O/D banking
    1. on demand
    2. overdraft
    3. overdrawn

abbreviation of overdose, attested from 1960. abbr.

  1. Doctor of Optometry
  2. oculus dexter (right eye)
  3. overdose
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