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. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.