Definitions
1.verbTo make prominent; emphasize.
2.verbTo be a highlight of.
3.verbTo mark (important passages of text), e.g. with a fluorescent marker pen or in a wordprocessor, as a means of memory retention or for later reference.
4.verbTo dye (part of the hair) a different color than the rest.
5.verbTo seek the attention of (a user) on IRC by mentioning their name in a message, causing that message to appear highlighted on their screen.