noun
young child; toddler
General term for a very young child, roughly from age 1 up to around 6 years old. Often used in everyday contexts.
公園で幼児が遊んでいる。
Young children are playing in the park.
幼児向けの絵本を買った。
I bought a picture book for toddlers.
noun
child over 1 but not yet of school age
Legal definition: a child who is at least 1 year old but has not yet reached school age (typically under 6 or 7). Used in legal and administrative contexts.
法律では、幼児は満1歳から就学前までの子どもを指す。
Under the law, '幼児' refers to a child from age 1 until school entry.