Definition of assume

• take to be the case or to be true; accept without verification or proof; "I assume his train was late"
• take on titles, offices, duties, responsibilities; "When will the new President assume office?"
• take on a certain form, attribute, or aspect; "His voice took on a sad tone"; "The story took a new turn"; "he adopted an air of superiority"; "She assumed strange manners"; "The gods assume human or animal form in these fables"