What is the morphology and morpheme? Give example

In English grammar and morphology, a morpheme is a meaningful linguistic unit consisting of a word (such as dog) or a word element (such as the -s at the end of dogs) that can't be divided into smaller meaningful parts. Adjective: morphemic.

Morphemes are the smallest units of meaning in a language. They are commonly classified as either free morphemes (which can occur as separate words) or bound morphemes (which can't stand alone as words).

EXAMPLES AND OBSERVATIONS

A prefix may be a morpheme:
"What does it mean to pre-board? Do you get on before you get on?"
(George Carlin) Individual words may be morphemes:
"They want to put you in a box, butnobody's in a box. You're not in a box."
(John Turturro) Contracted word forms may be morphemes:
"They want to put you in a box, but nobody's in a box. You're not in a box."
(John Turturro)