To authenticate by means of belief; to surmise; to suppose to be true, especially without proof
"She assumed that her friend was coming to dinner based on a single text message, even though he never actually arrived."
In plain English: To assume means to take something for granted without having proof that it is true.
"He assumed that everyone had received the invitation and left for the party early."
Usage: Use assume to mean taking something for granted or supposing it is true without sufficient evidence. Do not confuse this with the act of putting on clothing or adopting a specific behavior.
Example Sentences
"He assumed that everyone had received the invitation and left for the party early."verb
"She assumed that the meeting would start on time without any confirmation."verb
"You should not assume everyone agrees with your opinion just because they stayed silent."verb
"The company assumes full responsibility for delivering the package by Friday."verb