1. therapeutic exposure to sunlight

    Synonyms : heliotherapy
    Type Of : therapy
  2. sudden prostration due to exposure to the sun or excessive heat

    Synonyms : siriasis, sunstroke, thermic fever
    Type Of : heat hyperpyrexia, heatstroke
  3. incident solar radiation

    Type Of : solar radiation


  1. an incident in which an infectious disease is transmitted

    Synonyms : contagion, transmission
    Type Of : incident
  2. the communication of an attitude or emotional state among a number of people

    Synonyms : contagion
    Type Of : communication
    Examples :
    • the infection of his enthusiasm for poetry
  3. (international law) illegality that taints or contaminates a ship or cargo rendering it liable to seizure

    Type Of : illegality
  4. (medicine) the invasion of the body by pathogenic microorganisms and their multiplication which can lead to tissue damage and disease

    Type Of : pathologic process, pathological process
  5. moral corruption or contamination

    Type Of : corruptness, corruption
    Examples :
    • ambitious men are led astray by an infection that is almost unavoidable
  6. (phonetics) the alteration of a speech sound under the influence of a neighboring sound

    Type Of : linguistic process
  7. the pathological state resulting from the invasion of the body by pathogenic microorganisms

    Type Of : unhealthiness, ill health, health problem


  1. capable of replacing or changing places with something else; permitting mutual substitution without loss of function or suitability

    Synonyms : exchangeable, similar, standardised, standardized
    Examples :
    • interchangeable electric outlets
    • interchangeable parts
  2. (mathematics, logic) such that the arguments or roles can be interchanged

    Examples :
    • the arguments of the symmetric relation, `is a sister of,' are interchangeable


  1. inside the country

    Synonyms : home, interior, national
    Examples :
    • the nation's internal politics
  2. located inward

    Synonyms : inner, interior
    Examples :
    • an internal sense of rightousness
  3. innermost or essential

    Synonyms : inner, intimate
    Examples :
    • the internal contradictions of the theory
  4. occurring within an institution or community

    Synonyms : intragroup
  5. happening or arising or located within some limits or especially surface

    Antonyms : external
    Examples :
    • internal organs
    • internal mechanism of a toy
    • internal party maneuvering


  1. without delay or hesitation; with no time intervening

    Synonyms : at once, directly, forthwith, instantly, like a shot, now, right away, straight off, straightaway
    Examples :
    • he answered immediately
  2. near or close by

    Examples :
    • he passed immediately behind her
  3. bearing an immediate relation

    Examples :
    • this immediately concerns your future


  1. a discourteous manner that ignores accepted social usage

    Antonyms : politeness
    Type Of : discourtesy, rudeness


  1. becoming greater or larger

    Antonyms : decreasing
    Examples :
    • increasing prices
  2. (music) increasing in tempo and/or volume

    Antonyms : decreasing


  1. To the inside of; within. It is used in a variety of applications.


  1. exaggerate or make bigger

    Synonyms : amplify, blow up, expand
    Type Of : increase
    Examples :
    • The charges were inflated
  2. fill with gas or air

    Synonyms : blow up
    Antonyms : deflate
    Type Of : expand
    Examples :
    • inflate a balloons
  3. become inflated

    Synonyms : balloon, billow
    Type Of : expand
  4. cause prices to rise by increasing the available currency or credit

    Antonyms : deflate
    Type Of : change, modify, alter
    Examples :
    • The war inflated the economy
  5. increase the amount or availability of, creating a rise in value

    Antonyms : deflate
    Type Of : trim back, cut down, trim down, cut back, cut, reduce, bring down, trim
    Examples :
    • inflate the currency


  1. creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant

    Synonyms : fecundation, fertilisation, fertilization
    Type Of : creation, conception
  2. the process of totally saturating something with a substance

    Synonyms : saturation
    Type Of : suffusion, permeation, pervasion
    Examples :
    • the impregnation of wood with preservative
  3. material with which something is impregnated

    Type Of : material, stuff
    Examples :
    • the impregnation, whatever it was, had turned the rock blue