Thicket dream meaning is explained below using 4 different sources. Each interpretation is shown with its source.

Interpretation 1 — Martha Clarke

Its meaning is similar to that of UNDERBRUSH in that it represents obstacles to be overcome. It also alludes to situations or bits of the personality that are dark and mysterious. To go into the thicket to discover what is inside, or avoid it and go around, will be keys that reflect the attitude of the dreamer with respect to her life circumstances at the moment.
Source: The Big Dictionary of Dreams Author: Martha Clarke

Interpretation 2 — Nancy Wagaman

Tall or overgrown grass, brush, or shrubbery can represent: Perceived chaos or wildness, or a desire for more order or control somewhere in your life.

Neglect, or neglected responsibility.

The unknown.

Fear of a hidden threat.

The idea of hiding or being obscured.

Nature or the outdoors.

See Forest, Jungle, Vine, Tangle

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

Interpretation 3 — Margaret Hamilton

Tangles indicate a need to spiritually prune before entrapment; see “prune”
Source: Dream Dictionary Unlimited Author: Margaret Hamilton

Interpretation 4 — Katherine Taylor Craig

See Hedge.
Source: The Fabric of Dream Author: Katherine Taylor Craig