M
margin

The white space between the copy on the page and the trimmed edge of the paper.

mark-up

To take a pen and write typesetting specifications all over the page.

measure

The width of a column or the length of a line of type.

metrics

See font metrics.

modern type

A category of type that has a strong thick-thin contrast in the stroke weights and thin horizontal serifs.

monospaced

A font whose characters each take up the same amount of space. That is, a period uses the same width space as a capital W.

monoweight

The strokes of a letterform have very little difference in thickness all the way around.

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