IELTS infant Definition A very young child, typically under one year old. Example "The infant smiled at the sound of her mother's voice." Sign in to save IELTS Quiz → ← infancy infantile → Study tips featuring "infant" Study the Exact Words Examiners Use Audit Your Own Writing for Lexical Resource Explain New Words Out Loud To Yourself Related words TOEFL brighten IELTS startle GRE abide SAT abnormal TOEFL aboard TOEFL abolition IELTS upward TOEFL abort IELTS abortion SAT abrupt SAT absence TOEFL absent