We are always in meditation.
The universal definition of meditation is giving importance to experiences.
There are two types of meditation. Mainly, people know about only one type of meditation: concentration on a single thing. For example, concentrating on breathing, concentrating on the center of the eyes, or concentrating on thoughts, etc. From this, we can clearly see that we are giving importance to one experience, due to which we become more and more aware of that particular experience. This type of meditation is known as "dot meditation." So, our universal definition applies here.
Now let's talk about unheard meditation—probably the majority of you have never heard about it. It is the most uncommon and toughest meditation. In this meditation, you give importance to all experiences. For example, you sum up all experiences—from breathing to the center of the eyes, thoughts, etc.—and by doing this, your awareness becomes significant. From this, we can clearly see that we are now giving importance to many experiences at one time. This is called "whole" or "completeness meditation."
We can also clearly see that we are already in meditation, especially this completeness meditation. Then the question arises: why are we not that much aware? The answer is simple: because our concentration jumps from one thing to another, and we don't sum up our experiences at one time. For example, we don't completely give importance to many experiences simultaneously; we jump from one to another. We don't continuously watch all of them at the same time. This is the reason why we aren't aware. But truth be told, it's not like we are completely unaware. We are pretty much aware of every experience—from breathing to thoughts—it's just that we jump from one to the other and do not stay completely on every experience at the same time.
This meditation is helpful for boosting awareness. The yogi and a disciple of the path of knowledge use this to gain knowledge of oneness or remain in oneness. So, normal people can use it to increase their awareness, and a student of the path of knowledge or the path of spirituality can use this to gain knowledge of oneness or stay in oneness.
We can clearly see one thing for sure: it's just that where we place our importance changes here—nothing else. The rest of the things will automatically follow. So, my suggestion will be: if you want to experience oneness, you can practice this meditation, which is known as the "meditation of completeness" or "sum-up meditation." It has other names too, like the "meditation of beauty." Note that here, beauty and completeness are the same.