Definitions for "Jump bid"
bid made at a level higher than the lowest level at which that suit could be legally bid.
a bid more than 10 higher than the previous amount bid. Generally, a jump bid indicates to your (still-bidding) partner that there is at least one suit for which you cannot supply a card needed for the run. Don't use a jump bid if your partner has already passed (unless you're just trying to confuse your opponent) because you may unnecessarily reveal information about your hand.
Making a bid that is higher than that the auctioneer has just asked for. Learn more about how to bid at auction.