an item or person that can take the place of another

a person who takes the place of another in a job or performance

प्रतिनिधि

English Usage: The teacher found a substitute for her class while she was on leave.

Hindi Usage: टीचर ने अपनी छुट्टी के दौरान अपनी कक्षा के लिए एक प्रतिनिधि ढूंढा।

to replace one thing with another

to take the place of something that is missing

किसी की जगह लेना

English Usage: He had to substitute for his colleague who was sick.

Hindi Usage: उसे अपने बीमार सहयोगी की जगह लेना पड़ा।