According to the book referred by Respected sir, there are two definitions of Morphology.
The first one is that: Morphology is the study of systematic covariation in the form and meaning of words.
The other definition of Morphology is: Morphology is the study of the combination of morphemes to yield
words.
The first one is more useable in every form. The second defination should not be mixed up with the defination of syntax which is the study of the combination of words to yield sentences.