Gap

A break between prices on a chart that occurs when the price of a stock makes a sharp move up or down with no trading occurring in between. Gaps can be created by factors such as regular buying or selling pressure, earnings announcements, a change in an analyst's outlook or any other type of news release.

Investopedia Says:
An example of two different gaps can be seen in the chart above. Notice how the stock closes the trading session before the first gap at $50 and opens the next trading day near $46 with no trading occurring between the two prices. Gaps are a regular occurrence in all financial markets. However, they are rarely seen in the forex market since it is highly liquid and trades 24 hours a day.

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Finance: amount of a financing need for which provision has yet to be made. For example, ABC company might need $1.5 million to purchase and equip a new plant facility. It arranges a mortgage loan of $700,000, secures equipment financing of $400,000, and obtains new equity of $150,000. That leaves a gap of $250,000 for which it seeks gap financing. Such financing may be available from state and local governments concerned with promoting economic development.

Securities: securities industry term used to describe the price movement of a stock or commodity when one day's trading range for the stock or commodity does not overlap the next day's, causing a range, or gap, in which no trade has occurred. This usually takes place because of some extraordinary positive or negative news about the company or commodity. See chart on next page. See also Price Gap.

1) Refers to the card a player is missing in their hand.
2) An empty seat at a table.

SoundPoker Says: 1) This term is used particularly in reference to missing a card in the middle of an inside straight.
2) A dealer or even other players may try to get other participants to join the table to fill in the gaps.

See Also: Draw, Gut-Shot, Two-Gap