Definitions...

Absolute measurements-
measurements of fixed values
Relative measurements-
measurements linked to type size
Points-
unit of measurement used to measure the type size of a font
Picas-
unit of measurement equal to 12 pts
x-height-
the height of the lowercase 'x', relative to typface

Dashes (hyphen, en, em)-
specific pieces of punctuation, an en=1/2em, hyphen=1/3em
The em-
the relative unit of measurement in typesetting to define basic spacing functions
The en-
the relative unit of measurement equal to half of one em

Justification-
uses three values for type setting: minimum, maximum and optimu
Flush Left-
text aligned to left margin
Flush Right-
text alined to right margin

Letterspacing-
space between letterforms to open up text
Kerning-
adjustment of space between characters
Tracking-
the amount of spacing between characters
Word Spacing-
the amount of space between words
Widow-
a lone word at the end of a paragraph
Orphan-
the final one or two lines of a paragraph separated from the main paragraph
Leading-
space between lines of text in a text block

Indent-
line/s of text shifted left or right
First Line Indent-
text indented from the left margin in the first line of paragraphs
Hanging Indent-
indentation affecting several lines of text except the first line