Meaning & use
immature
Not fully developed physically or emotionally, or behaving in a childish way inappropriate for one's age.
See it in a sentence
The manager scolded him for making immature jokes during the client meeting.
The seeds need more time in the greenhouse because the plants are still immature.
A note on using this word
Immature can describe literal physical development or, more commonly in everyday speech, emotionally childish behavior in an adult.
Words with a similar meaning
childishundeveloped
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
matureadult
Make it your own
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