A person or thing that takes the place of another.

An alternative.

विकल्प

English Usage: "If you run out of sugar, honey can be a good substitute."

Hindi Usage: "अगर तुम्हारे पास चीनी नहीं है, तो शहद एक अच्छा विकल्प हो सकता है।"

To replace one thing with another.

To act in the place of someone else.

किसी और के स्थान पर कार्य करना

English Usage: "He had to substitute for his colleague during the presentation."

Hindi Usage: "उसे प्रस्तुति के दौरान अपने सहकर्मी के स्थान पर कार्य करना था।"