The definition of the number 4 is a cardinal number that comes after three and before five. It is an even whole number, meaning it can be divided by two with no remainder. In mathematics, four has many uses and properties that make it unique from other numbers in its category.

Four can represent stability when used in geometry to create squares or rectangles due to its ability to form right angles with equal sides. This makes it popular for use in architecture as well as engineering design projects since these shapes are strong and reliable structures which provide support for larger buildings or objects such as bridges or towers.

Additionally, four also represents balance because of this same symmetry—it’s able to maintain equilibrium even when being pulled from different directions at once without becoming unbalanced; this makes it ideal for construction purposes where stability is essential (elevators, escalators).

In terms of numerology, the energy associated with the digit 4 symbolizes orderliness—the need for structure and organization within one’s life so they may reach their goals more efficiently; this could include setting up routines/schedules on how best utilize time management skills etc., all while staying focused on what needs getting done each day/week etc.

Four also stands out among other single-digit numbers due its association with hard work: if you want something bad enough then you have put forth effort into making sure those dreams become reality rather than just wishing upon a star!