Meaning & Definition
verb
to inform positively, or to state with confidence to someone, that something will happen or is true.
I assure you that the project will be completed on time.
to make someone confident or certain about something.
She assured him that everything would work out fine.
to provide a guarantee or promise regarding something.
The manager assured the staff that their jobs were secure.
Etymology
Middle English 'assuren', from Old French 'assurer', from Latin 'assecurare'.
Common Phrases and Expressions
assure of one's safety:
to give someone confidence regarding their safety
assure someone that:
to make someone feel sure about something specific
assure oneself:
to gain confidence about one's own opinion or feeling
Slang Meanings
to guarantee something
I assure you, that deal is solid.
to affirm someone's doubts
Don't worry, I've got this, I assure you!