When you dream of the horizontal line, then it represents the tangible aspects of your life.
Dream dictionary: Horizontal dream meanings
In a dream, a horizontal wound means enmity, backbiting and slander.
…in his legs in a dream, it means longevity. If one’s foot is wounded in the dream, it means that his authority and control will become firmer. If one receives a cut and no blood runs out of his wound in a dream, it means that the assailant will say something true about his victim, representing the answer the person in the dream needs to realize. A bleeding wound in a dream also means being subject to backbiting, though what will be said is true. If one sees an angel piercing his stomach with a sword, whereby he thinks that he is dead in the dream, it means that he may suffer from an ulcer which will ultimately heal. If the sword inflicts a wound in his neck in a dream, it means prosperity which will mostly benefit his progeny. (Also see Horizontal wound | Surgery | Vertical wound)…
Dreaming about lintel that is new or in good condition indicates that favorable changes are coming. Your house will improve. Rotten or burned horizontal beam that supports the weight of the wall above a window or door means that financial problems will affect your home.
…In a dream, a lancet represents a slanderer. To cause a horizontal cut to someone with a lancet in a dream means backbiting him, slandering him and causing enmity between people. If the wound is vertical in the dream, then it means speaking well of someone and bringing people’s hearts together. (Alsosee Javelin | Lance)…
To dream of the stripes, denotes to brave allegation you have made. The vertical stripes, indicate your tendency to be misfit, while the horizontal stripes denote to immediacy. Consider that black and white stripes, indicates your limited thoughts and ideas.