segment

noun

1. A length of some object.

   “a segment of rope”

2. One of the parts into which any body naturally separates or is divided; a part divided or cut off; a section; a portion.

   “a segment of an orange; a segment of a compound or divided leaf”

   “The ability of a segment of a glass sphere to magnify whatever is placed before it was known around the year 1000, when the spherical segment was called a reading stone,[…]. Scribes, illuminators, and scholars held such stones directly over manuscript pages as an aid in seeing what was being written, drawn, or read.”

3. A portion.
4. A portion.
5. A portion.
6. A portion.
7. A portion.
8. A portion.

   “In Lejeuneaceae vegetative branches normally originate from the basiscopic basal portion of a lateral segment half, as in the Radulaceae, and the associated leaves, therefore, are quite unmodified.”

9. A portion.
10. A part of a broadcast program, devoted to a topic.

    “The news showed a segment on global warming.”

    “In “Treehouse Of Horror” episodes, the rules aren’t just different—they don’t even exist. If writers want Homer to kill Flanders or for a segment to end with a marriage between a woman and a giant ape, they can do so without worrying about continuity or consistency or fans griping that the gang is behaving out of character.”

11. An Ethernet bus.
12. A region of memory or a fragment of an executable file designated to contain a particular part of a program.
13. A portion of an itinerary: it may be a flight or train between two cities, or a car or hotel booked in a particular city.

verb

1. (ambitransitive)To divide into segments or sections.

   “Segment the essay by topic.”