gap an opening in a solid structure or surface There is a large gap in the wall where the artillery shell exploded. an interruption of continuity The record is not complete because of a nine- minute gap in the conversation. There are wide gaps in my knowledge of histor. ÷a conspicuous difference or imbalance; disparity a gap between revenue and spending the widening gap between rich and poor gap ❖ an opening in a solid structure or surface There is a large gap in the wall where the artillery shell exploded. ❖ an interruption of continuity The record is not complete because of a nine￾minute gap in the conversation. There are wide gaps in my knowledge of history. ❖ a conspicuous difference or imbalance; a disparity a gap between revenue and spending the widening gap between rich and poor