A formative period of time or experience is one that has an important and lasting influence on a person's character and attitudes. adj usu ADJ n
She was born in Barbados but spent her formative years in east London.
Translation English Cobuild Collins Dictionary
1 impressionable, malleable, mouldable, pliant, sensitive, susceptible
2 determinative, developmental, influential, moulding, shaping
English Collins Dictionary - English synonyms & Thesaurus
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