Definitions:
each of the parts into which something is or may be divided

a part of a figure cut off by a line or plane intersecting it.

each of the series of similar anatomical units of which the body and appendages of some animals are composed, such as the visible rings of an earthworm's body.

the smallest distinct part of a spoken utterance, especially with regard to vowel and consonant sounds rather than stress or intonation.

divide (something) into separate parts or sections