What does Bit-mapped graphic mean?

Bit-mapped graphic meaning in Computer Science Dictionary

Description familiar with explain an image that's formed in a map form in the place of a mathematical form. The image is done by putting dots (or bits) consecutively or column creating a picture with several thousand tiny dots or bits to really make the total image. A bit-mapped picture whenever increased has jaggies, where a vector graphic can be enlarged without the losing high quality.