[dahy-uh-gram] 
noun, verb, -gramed or -grammed, -gram⋅ing or -gram⋅ming.| 1. | a figure, usually consisting of a line drawing, made to accompany and illustrate a geometrical theorem, mathematical demonstration, etc. |
| 2. | a drawing or plan that outlines and explains the parts, operation, etc., of something: a diagram of an engine. |
| 3. | a chart, plan, or scheme. |
| 4. | to represent by a diagram; make a diagram of. |
| di·a·gram (dī'ə-grām') n.
To indicate or represent by or as if by a diagram. [Latin diagramma, figure, from Greek, a figure worked out by lines, plan, from diagraphein, to mark out, delineate : dia-, dia- + graphein, to write; see gerbh- in Indo-European roots.] di'a·gram'ma·ble adj., di'a·gram·mat'ic (-grə-māt'ĭk), di'a·gram·mat'i·cal adj., di'a·gram·mat'i·cal·ly adv. |
əˌgræm