1. To represent in a diagram.

2. A drawing for the purpose of demonstrating the properties of any figure, as a square, triangle, circle, &c.; an illustrative drawing or figure; a scale.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• diapragm,
• igram,
• diapgragm,
• diragram,
• diagraph,
• diagrames,
• diagramm,
• digrams,
• diaghram,
• diaghragm,
• diagree,
• diafragm,
• diagragm,
• digram,
• diaphram,
• diarama,
• doagram,
• diagrapm,
• daigram,
• diagramme

• diagrams,
• disarm,
• gram,
• diagrammed,
• dicranum,
• diagraming,
• disarmer,
• disarming,
• diagramed.

The adverb form of the word "diagram" is "diagrammatically".

The adjective form of the word "diagram" is "diagrammatic" or "diagrammatical".

The plural of the "diagram" can be the "diagrams".

The singular of the "diagram" can be the "diagram".