The term refers to a word puzzle format where words are entered into a grid based on intersecting clues. These puzzles often rely on a combination of vocabulary, general knowledge, and lateral thinking to derive the correct answers. An example is a grid with numbered clues that must be solved and entered accordingly.
The appeal of these puzzles lies in their ability to enhance cognitive skills, vocabulary, and problem-solving abilities. Historically, they have served as a form of entertainment and mental exercise, appearing in newspapers and dedicated puzzle books for decades. Their enduring popularity is a testament to their engaging and accessible nature.