1. the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water

    Synonyms : rusting
    Type Of : erosion, corrosion, corroding, oxidization, oxidisation, oxidation
  2. of the brown color of rust

    Synonyms : rust-brown, rusty
  3. any of various fungi causing rust disease in plants

    Synonyms : rust fungus
    Type Of : fungus
  4. become destroyed by water, air, or a corrosive such as an acid

    Synonyms : corrode
    Type Of : crumble, decay, dilapidate
    Examples :
    • The pipes rusted
  5. cause to deteriorate due to the action of water, air, or an acid

    Synonyms : corrode, eat
    Type Of : damage
    Examples :
    • The steady dripping of water rusted the metal stopper in the sink
  6. a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi

    Type Of : plant disease
  7. a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture

    Type Of : ferric oxide
  8. become coated with oxide

    Type Of : oxidize, oxidise, oxidate


  1. the act of returning money received previously

    Synonyms : repayment
    Type Of : defrayal, payment, defrayment
  2. pay back

    Synonyms : give back, repay, return
    Type Of : pay
    Examples :
    • Please refund me my money
  3. money returned to a payer

    Type Of : payment


  1. flow in an irregular current with a bubbling noise

    Synonyms : babble, bubble, burble, guggle, gurgle
    Type Of : sound, go
  2. stir up (water) so as to form ripples

    Synonyms : cockle, riffle, ruffle, undulate
    Type Of : flux, flow
  3. a small wave on the surface of a liquid

    Synonyms : riffle, rippling, wavelet
    Type Of : moving ridge, wave
  4. (electronics) an oscillation of small amplitude imposed on top of a steady value

    Type Of : vibration, oscillation


  1. restrain the emission of (sound, fluid, etc.)

    Synonyms : baffle
    Type Of : hold back, restrain, keep, keep back
  2. shape or influence; give direction to

    Synonyms : determine, influence, mold, shape
    Type Of : cause, make, do
  3. bring into conformity with rules or principles or usage; impose regulations

    Synonyms : govern, order, regularise, regularize
    Antonyms : deregulate
    Type Of : decide, make up one's mind, determine
    Examples :
    • We cannot regulate the way people dress
    • This town likes to regulate
  4. fix or adjust the time, amount, degree, or rate of

    Synonyms : modulate
    Type Of : adjust, correct, set
    Examples :
    • regulate the temperature


  1. in a random manner

    Synonyms : arbitrarily, at random, every which way, haphazardly, indiscriminately, willy-nilly
    Examples :
    • the houses were randomly scattered


  1. (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements

    Synonyms : nuclear reactor
    Type Of : apparatus, setup
  2. an electrical device used to introduce reactance into a circuit

    Type Of : electrical device


  1. destruction achieved by causing something to be wrecked or ruined

    Synonyms : laying waste, ruin, ruination, wrecking
    Type Of : destruction, devastation


  1. feeling great rapture or delight

    Synonyms : ecstatic, enraptured, rapt, rhapsodic


  1. the state of being physically constrained

    Synonyms : constraint
    Type Of : confinement
    Examples :
    • dogs should be kept under restraint
  2. lack of ornamentation

    Synonyms : chasteness, simpleness, simplicity
    Type Of : plainness
    Examples :
    • the room was simply decorated with great restraint
  3. discipline in personal and social activities

    Synonyms : control
    Antonyms : unrestraint
    Type Of : discipline
    Examples :
    • he was a model of polite restraint
  4. a device that retards something's motion

    Synonyms : constraint
    Type Of : device
    Examples :
    • the car did not have proper restraints fitted
  5. a rule or condition that limits freedom

    Type Of : restriction, limitation
    Examples :
    • legal restraints
    • restraints imposed on imports
  6. the act of controlling by restraining someone or something

    Type Of : control
    Examples :
    • the unlawful restraint of trade


  1. a pitcher who does not start the game

    Synonyms : fireman, relief pitcher
    Type Of : twirler, hurler, pitcher
  2. a person who reduces the intensity (e.g., of fears) and calms and pacifies

    Synonyms : allayer, comforter
    Type Of : soul, individual, someone, somebody, person, mortal
    Examples :
    • a reliever of anxiety
  3. someone who takes the place of another (as when things get dangerous or difficult)

    Synonyms : backup, backup man, fill-in, relief, stand-in, substitute
    Type Of : compeer, equal, match, peer