Definitions

1. adjective

based on or in accordance with a particular principle or idea, especially a traditional or conventional one

“She had a truistic view on life: that people are fundamentally good.”

2. noun

a maxim or a phrase that expresses a general truth or piece of advice

“The saying ‘honesty is the best policy’ is a common truism.”

3. noun

a statement or principle that is considered to be obviously true or universally accepted

“The truism that a picture is worth a thousand words is often used in advertising.”