1. of or relating to the period before the biblical flood

    Synonyms : antediluvial
    Examples :
    • antediluvian man
  2. so extremely old as seeming to belong to an earlier period

    Synonyms : antiquated, archaic
    Examples :
    • a ramshackle antediluvian tenement
    • antediluvian ideas
  3. a very old person

    Synonyms : ancient
    Type Of : golden ager, old person, oldster, senior citizen
  4. any of the early patriarchs who lived prior to the Noachian deluge

    Synonyms : antediluvian patriarch
    Type Of : patriarch


  1. used especially of drugs or muscles that counteract or neutralize each other's effect

    Synonyms : incompatible
    Antonyms : synergistic
  2. indicating opposition or resistance

    Synonyms : counter
  3. characterized by antagonism or antipathy

    Synonyms : antipathetic, antipathetical
    Examples :
    • slaves antagonistic to their masters
  4. arousing animosity or hostility

    Antonyms : conciliatory
    Examples :
    • his antagonistic brusqueness
    • Europe was antagonistic to the Unites States
  5. incapable of harmonious association


  1. a state of deep-seated ill-will

    Synonyms : enmity, hostility
    Type Of : state
  2. an actively expressed feeling of dislike and hostility

    Type Of : dislike, hostility, ill will, enmity
  3. (biochemistry) interference in or inhibition of the physiological action of a chemical substance by another having a similar structure

    Type Of : interference, hindrance, hinderance
  4. the relation between opposing principles or forces or factors

    Type Of : opposition, oppositeness
    Examples :
    • the inherent antagonism of capitalism and socialism


  1. deviation from the normal or common order or form or rule

    Synonyms : anomalousness
    Type Of : abnormality, abnormalcy
  2. a person who is unusual

    Synonyms : unusual person
    Type Of : someone, mortal, individual, somebody, soul, person
  3. (astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun)

    Type Of : position, place


  1. an addition that extends a main building

    Synonyms : annexe, extension, wing
    Type Of : addition, add-on, improver
  2. attach to

    Type Of : append, add on, affix, supplement
  3. take (territory) as if by conquest

    Type Of : seize, take over, arrogate, assume, usurp
    Examples :
    • Hitler annexed Lithuania


  1. a feeling of ill will arousing active hostility

    Synonyms : animus, bad blood
    Type Of : enmity, hostility, ill will


  1. short account of an incident (especially a biographical one)

    Type Of : account, report


  1. a state of lawlessness and disorder (usually resulting from a failure of government)

    Synonyms : lawlessness
    Type Of : disorder


  1. similar or equivalent in some respects though otherwise dissimilar

    Synonyms : correspondent
    Examples :
    • brains and computers are often considered analogous
    • salmon roe is marketed as analogous to caviar
  2. corresponding in function but not in evolutionary origin

    Antonyms : heterologous, homologous
    Examples :
    • the wings of a bee and those of a hummingbird are analogous


  1. a medicine used to relieve pain

    Synonyms : anodyne, pain pill, painkiller
    Type Of : medication, medicinal drug, medicine, medicament
  2. capable of relieving pain

    Synonyms : analgetic, anodyne
    Examples :
    • an analgesic effect