To jump is to hop or leap, straight up or over something. Frogs, amazingly, are able to jump up to twenty times the length of their body.

You can jump over a puddle or over the jump rope your friends are turning. You might jump in surprise or fear, like when a scary noise in the night makes you jump, or startle. You can jump off of something, like a diving board, or figuratively jump into an activity. If a bully jumps you, he attacks you suddenly, and if your brother says, "Go jump in a lake," he means "Go away, you're bothering me."

Definitions of jump
  1. verb
    move forward by leaps and bounds
    “Can you jump over the fence?”
    synonyms: bound, leap, spring
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    jump straight up
    bounce, bound, rebound, recoil, resile, reverberate, ricochet, spring, take a hop
    spring back; spring away from an impact
    move suddenly, energetically, or violently
    leap suddenly
    perform a capriole, of horses in dressage
    move around heavily and clumsily
    ski jump
    jump on skis
    leap or skip, often in dancing
    bound vigorously
    jump across
    overleap, vault
    jump across or leap over (an obstacle)
    perform a leap where both hind legs come off the ground, of a horse
    hop, hop-skip, skip
    jump lightly
    jump about playfully
    make a jump forward or upward
    kick, kick back, recoil
    spring back, as from a forceful thrust
    bound off, skip
    bound off one point after another
    rebound after hitting
    jump a hurdle
    type of:
    move so as to change position, perform a nontranslational motion
  2. verb
    move or jump suddenly, as if in surprise or alarm
    synonyms: start, startle
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    start suddenly, as from fright
    startle with amazement or fear
    rear back
    start with anger or resentment or in protest
    go forward or start with a fast, sudden movement
    type of:
    move so as to change position, perform a nontranslational motion
  3. verb
    make a sudden physical attack on
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    type of:
    assail, assault, attack, set on
    attack someone physically or emotionally
  4. verb
    enter eagerly into
    “He jumped into the game”
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    type of:
    enter, participate
    become a participant; be involved in
  5. verb
    cause to jump or leap
    “the trainer jumped the tiger through the hoop”
    synonyms: leap
  6. noun
    the act of jumping; propelling yourself off the ground
    “he advanced in a series of jumps
    “the jumping was unexpected”
    synonyms: jumping
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    a headlong jump (or fall)
    the act of hopping; jumping upward or forward (especially on one foot)
    bounce, bound, leap, leaping, saltation, spring
    a light, self-propelled movement upwards or forwards
    hurdle, vault
    the act of jumping over an obstacle
    jumping up and down
    jumping in one spot (as in excitement)
    (dressage) a vertical jump of a trained horse with a kick of the hind legs at the top of the jump
    caper, capriole
    a playful leap or hop
    the act of pouncing
    type of:
    actuation, propulsion
    the act of propelling
  7. noun
    a sudden involuntary movement
    synonyms: start, startle
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    startle reaction, startle response
    a complicated involuntary reaction to a sudden unexpected stimulus (especially a loud noise); involves flexion of most skeletal muscles and a variety of visceral reactions
    Moro reflex, startle reflex
    a normal reflex of young infants; a sudden loud noise causes the child to stretch out the arms and flex the legs
    flinch, wince
    a reflex response to sudden pain
    type of:
    inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex, reflex action, reflex response, unconditioned reflex
    an automatic instinctive unlearned reaction to a stimulus
  8. verb
    jump down from an elevated point
    “the parachutist didn't want to jump
    synonyms: jump off, leap
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    type of:
    move so as to change position, perform a nontranslational motion
  9. verb
    jump from an airplane and descend with a parachute
    synonyms: chute, parachute
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    sky dive, skydive
    jump from an airplane and perform various maneuvers before opening one's parachute
    type of:
    dive, plunge, plunk
    drop steeply
  10. verb
    run off or leave the rails
    synonyms: derail
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    type of:
    go, locomote, move, travel
    change location; move, travel, or proceed, also metaphorically
  11. noun
    descent with a parachute
    synonyms: parachuting
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    performing acrobatics in free fall before pulling the ripcord of a parachute
    type of:
    the act of changing your location in a downward direction
  12. verb
    increase suddenly and significantly
    “Prices jumped overnight”
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    type of:
    climb, mount, rise, wax
    go up or advance
  13. verb
    rise in rank or status
    “Her new novel jumped high on the bestseller list”
    synonyms: climb up, rise
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    type of:
    undergo a change; become different in essence; losing one's or its original nature
  14. noun
    a sudden and decisive increase
    “a jump in attendance”
    synonyms: leap
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    quantum jump, quantum leap
    a sudden large increase or advance
    type of:
    a change resulting in an increase
  15. verb
    pass abruptly from one state or topic to another
    jump to a conclusion”
    jump from one thing to another”
    synonyms: leap
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    type of:
    change, shift, switch
    lay aside, abandon, or leave for another
  16. verb
    go back and forth; swing back and forth between two states or conditions
    synonyms: alternate
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    type of:
    alter, change, vary
    become different in some particular way, without permanently losing one's or its former characteristics or essence
  17. verb
    synonyms: pass over, skip, skip over
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    type of:
    drop, leave out, miss, neglect, omit, overleap, overlook, pretermit
    leave undone or leave out
  18. noun
    an abrupt transition
    synonyms: leap, saltation
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    quantum jump
    (physics) an abrupt transition of an electron or atom or molecule from one quantum state to another with the emission or absorption of a quantum
    type of:
    a change from one place or state or subject or stage to another
  19. noun
    (film) an abrupt transition from one scene to another
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    type of:
    a passage that connects a topic to one that follows
  20. verb
    start (a car engine whose battery is dead) by connecting it to another car's battery
    synonyms: jump-start, jumpstart
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    type of:
    start, start up
    get going or set in motion
  21. verb
    be highly noticeable
    synonyms: jump out, leap out, stand out, stick out
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    type of:
    appear, look, seem
    give a certain impression or have a certain outward aspect
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