- Supposedly is defined as according to what is believed.
An example of supposedly is a teen saying he did his homework, although his mother is sure she saw him talking on the phone.
according to what is, was, or may be supposed
- As a matter of supposition; in the beliefs or according to the claims of some people.
- People from other planets have supposedly visited Earth in flying saucers.
- According to your testimony, you were supposedly at home watching TV when the murder occurred.