Gap (noun)

1. An opening or break in something that is usually solid or continuous, such as a space between two objects.
2. A break or interruption in continuity or uniformity.
3. A difference or discrepancy, such as in opinions or abilities.
4. A lack or deficiency, such as in knowledge or understanding.
5. A space in a fence or wall, such as for a gate or door.

Origin:

Middle english, from old english gæp; akin to old high german gab gap, old english gæpan to gape.

Examples:

1. The gap between the two buildings was too wide to jump.
2. The gap in her education made it difficult for her to understand the material.
3. The gap in the fence allowed the animals to escape.
4. The gap in their opinions caused a disagreement.
5. The gap in the records makes it hard to trace the history.