Meaning of the word "highly developed" in English

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

highly developed

US /ˈhaɪli dɪˈveləpt/
UK /ˈhaɪli dɪˈveləpt/

Adjective

having reached an advanced stage of growth or development

Example:
Japan is a highly developed country with advanced technology.
The human brain is a highly developed organ.