What is meant by 4th dimension?

Answer 1

When a reference is used to four-dimensional co-ordinates, it is likely that what is referred to is the three spatial dimensions plus a time-line. Taken from Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Fourth_dimension

Lengh X Width X Height X Time + Love :) ANSWER Not counting Virtual Reality, everything you know of is four-dimensional. The fourth dimension is probably the hardest dimension to understand. It's made up of 4 parts, length x width x depth x time( L x W x De x t). Therefore, there really is no visual object that is not four-dimensional.

Answer 2

In physics and mathematics, the fourth dimension typically refers to a theoretical dimension beyond the three dimensions of space (length, width, height) that we are familiar with. It is used to describe complex concepts like time or in theories of higher dimensions such as in string theory. The idea of a fourth spatial dimension beyond the three we experience is purely theoretical and has not been directly observed.