diagram

1. (category theory) A functor from an index category to another category. The objects and morphisms of the index category need not have any internal substance, but rather merely outline the connective structure of at least some part of the diagram's codomain. If the index category is J and the codomain is C, then the diagram is said to be "of type J in C".

2. (crosswording) A crossword grid.Examples: "Because you have fewer 10- to 15-letter entries in the diagram, you can make judgment calls more quickly by testing out the long ones at the outset."; "A crossword puzzle consists of a diagram that usually is rectangular and divided into blank (white) and cancelled (black, shaded, or crosshatched) squares."; "If you think of a completed crossword diagram as a house, short words with common letters are the necessary “mortar” that makes the longer, more interesting “brick” words in a puzzle possible."