noun
    
    plural grounds
    
    the ground :the surface of the earth
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    [noncount] :the soil that is on or under the surface of the earth
    
    
    
    
    
    
    
    
    
    [noncount] :an area of land
    
    
    
    
    
    
    
    [count] :an area of land or sea that is used for a particular purpose
    
    
    
    
    
    
    
    
    
    
    
    c grounds [plural] :the land around a building
    
    
    
    
    
    
    
    [noncount] :the bottom of the ocean, a lake, etc.
    
    
    
    [noncount] :an area of knowledge or interest
    
    
    
    
    
    
    
    [singular] :a place or situation in which someone or something is developed or tested
    
    
    
    
    
    a set of beliefs, opinions, or attitudes [noncount]
    
    
    
    
    
    
    
    [count] :a reason for doing or thinking something - usually plural
    
    
    
    
    
    
    
    
    
    
    
    grounds [plural] :very small pieces of crushed coffee beans
    
    
    
    [count] US :a wire or metal object that makes an electrical connection with the earth - usually singular
    
    
    
    [count] :the area behind or around a design
    
    
    
    above ground
    
    on top of the earth's surface
    
    
    
    below ground
    
    under the earth's surface
    
    
    
    break ground
    
    to dig into the ground at the start of building something
    
    
    
    or break new ground :to make new discoveries
    
    
    
    burn to the ground
    
    
    
    down to the ground
    
    Brit informal :completely or perfectly
    
    
    
    from the ground up
    
    completely or thoroughly
    
    
    
    from a point at which nothing has been done :from the very beginning
    
    
    
    gain ground
    
    or make up ground
    
    to move faster so that you come closer to someone or something that is in front of you
    
    
    
    
    
    
    
    
    
    get off the ground
    
    to begin to operate or proceed in a successful way
    
    
    
    get (something) off the ground :to cause (something) to begin to operate or proceed in successful way
    
    
    
    give ground
    
    to move backward when you are being attacked :retreat
    
    
    
    
    
    have/keep your feet on the ground
    
    
    
    hit the ground running
    
    
    
    hold/stand your ground
    
    to not change your position when you are being attacked :to not retreat
    
    
    
    
    
    
    
    into the ground
    
    to the point of being very tired or exhausted
    
    
    
    to the point of complete failure or ruin
    
    
    
    
    
    lose ground
    
    to move slower so that you are farther away from someone or something that is in front of you
    
    
    
    
    
    
    
    verb
    
    grounds; grounded; grounding
    
    [+ obj] :to provide a basis or reason for (something) - usually used as (be) grounded
    
    
    
    
    
    
    
    
    
    to cause a ship or boat to hit the ground below the water so that it cannot move [+ obj]
    
    
    
    
    
    
    
    [+ obj] :to prevent (an aircraft or a pilot) from flying
    
    
    
    
    
    
    
    [+ obj] :to stop (a child) from leaving the house to spend time with friends as a form of punishment
    
    
    
    
    
    [+ obj] US :to connect (a wire, a device, etc.) electrically to the ground for safety
    
    
    
    [no obj] baseball :to hit a ground ball
    
    
    
    
    
    [+ obj] American football :to throw (a football) to the ground in order to avoid being tackled
    
    
    
    ground in
    
    [phrasal verb]
    
    ground (someone) in (something) :to give (someone) basic knowledge about (something)
    
    
    
    
    
    past tense and past participle of 1grind