Meaning of the word eldest in English

What does eldest mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

eldest

US /ˈel.dɪst/
UK /ˈel.dɪst/

Adjective

of the greatest age; oldest (used especially of the firstborn among siblings)

Example:
My eldest sister is a doctor.
He is the eldest of three brothers.