In our everyday experience, we are accustomed to thinking about objects and entities as having dimensions, such as length, width, and height. However, when we discuss something existing without any dimension, it usually refers to abstract concepts or mathematical constructs rather than physical objects.
In mathematics, there are entities that can be considered to exist without any physical dimensions. For example, a point is often described as having zero dimensions. In geometric terms, a point represents a location in space but has no size, length, width, or height. It is essentially a position without any extent. While points can be conceptualized and used in mathematical models, they do not have a physical presence.
Similarly, in certain branches of theoretical physics and cosmology, there are theories that explore the possibility of extra dimensions beyond the familiar three spatial dimensions and one time dimension that we experience in our everyday lives. These additional dimensions, if they exist, might be compactified or curled up at scales too small to be directly observed. These extra dimensions are often postulated based on mathematical frameworks like string theory or certain variations of quantum gravity. However, it's important to note that these extra dimensions, if they exist, are not directly perceptible to us and are primarily theoretical constructs used to explain specific phenomena at microscopic scales.
So, when we discuss something existing without any dimension, it often refers to abstract concepts in mathematics or hypothetical constructs in theoretical physics that are not directly related to our physical reality. These concepts are valuable for theoretical exploration, modeling, and understanding certain phenomena, but they do not represent tangible objects with physical existence in the conventional sense.