Barrette dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — myjellybean

To dream that you are putting your hair up in a barrette, suggests that you are evaluating a new idea, outlook or way of thinking. You may be changing the way you approach your self-image and appearance.
Source: My Dream Interpretation Author: myjellybean

Interpretation 2 — Margaret Hamilton

Used to restrain one’s protective covering of safety and authority
Source: Dream Dictionary Unlimited Author: Margaret Hamilton