position eight in a countable series of things
"She finished eighth in the marathon, crossing the line just behind the seventh runner."
one part in eight equal parts
"The cake was cut into eighth slices, so each piece represented exactly one part of the whole."
The person or thing in the eighth position.
"She finished as the eighth runner across the finish line."
In plain English: An eighth is one of eight equal parts that make up a whole thing.
"She finished running in eighth place at the track meet."
to divide by eight
"The teacher asked each student to eighth their total points and write down the result."
The ordinal form of the number eight.
"She finished in eighth place during the race."
In plain English: Eighth means being out of eight people, items, or parts when you count them from first to last.
"She finished running in eighth place at her high school cross-country meet."
Usage: Use "eighth" as an adjective to describe something that comes after seven, such as the eighth chapter or eighth place. It functions identically to other ordinals like first and second by preceding a noun without requiring an article before it in this specific ordinal context.
Eighth comes from the Middle English word eightethe, which traces back to Old English and Proto-Germanic roots. It is formed by combining the number eight with an ordinal suffix meaning "th".