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

Interpretation 1 — Nancy Wagaman

A foundation or platform.

Balanced.

Sturdy.

Secure.

A box or container.

Consider what the shape means to you personally and the context in which it appears in the dream.

See Shape, Square

Source: The Curious Dreamer’s Dream Dictionary Author: Nancy Wagaman

Interpretation 2 — myjellybean

To see a rectangle in your dream, represents stability and material things. It also suggests that the dreamer is a hard worker.
Source: My Dream Interpretation Author: myjellybean