To better understand multidimensions, is to comprehend that there are many different timelines which make up the harmonic scale of the Universal Time Matrix. In the creational structure of Harmonic Universes there are two timelines per dimensional octave. So within our Harmonic Universe of 3D earth, within the three dimensions, we have six timelines. When we energetically evolve and move up in octave, being initiated into higher frequencies, we are exposed to more dimensional octaves, therefore more potential timelines. Within these dimensions of future timelines are “stations of identity”, commonly called “Soul”, “oversoul”, “higher self”, which comprise body parts or whole spiritual bodies of our “forgotten” selves. These are spiritual energetic bodies that hold our intelligence matrices, our mind matrices, that make up our spiritual identity, and of which we are designed to reclaim during these “Timeline Collapses” transpiring during the Ascension Cycle. This is why those on the ascension path continually experience energetic healing by meeting the cellular memories of their unresolved emotion and Consciousness states throughout the multiple timelines experienced by other selves and their identities or lifetimes. (What? This painful emotional theme, again?) We have to move through the series of timelines in each dimensional octave and reclaim our spiritual identity while recoding and changing the obsolete or false reality of Alien Machinery from interfering with our continued spiritual growth. Like a tri-athlete running and jumping over the hurdles, we merge with these multidimesnional timefields and collect our spiritual bodies, thus reclaiming our Consciousness to make it to the finish line. What is being accomplished with this process, especially now with Guardian Ascension Timeline, is that we have to move through all the artificial Mind Controlled, inorganic time fields ( negative alien timelines with their False Gods enslavement agendas) in order to arrive at the God Gateway, the Center point of union in Zero Point.
Because the planet is ready to drop and collapse timelines from the previous 3D cycle, there is a struggle to dominate upcoming events that would influence these future timelines to be solely in Negative Alien NAA controls, based on the hidden history of the Atlantian Cataclysm.
With the Galactic timelines opening and a new entry point emerging, it is the time is to bring more clarity on the 12 D commission which is Ascension Plan B. The Melchizedek Guardian Groups, are the groups that oversee and direct the planetary repair projects ( from 12 D) that specifically result in the collapsing and clearing away of distorted False Timelines, the distorted historical human records that created DNA damage in the past, present and future. It is this group that works with the Universal holographic architecture in order to repair its structural integrity back into the organic creation code of the Ascension Timeline. The Ascension timeline would reflect the Pathway back to God Source connection, the return to the Zero Point God matrix, the point of our creational genesis.Please note that Melchizedek hosting ended in December 2012, and Krystal Star Guardians have taken over the planetary hosting cycle.
With the Andromeda Core link up to the Milk Way Core and our Earth Core, the Transharmonic Universe Timelines will now be available for access at this level of human consciousness after eons of time. This transpired as a result from the multidimensional intersection (and timeline grids collapse) that was anchored into our time zone as a part of the events in March 2007 and ongoing. This was a part of implementing the Ascension Plan B Timeline Project which is not the original stair step Ascension model planned to merge humanity and the planet with its 5th Dimensional Counterpart. (see 5D Ascension).This Cosmic Trinity intersection is a Transharmonic Conversion Point, the place which connects to the middle time zone and the Inner Earth time zone which leads up to the 12D Blueprints that exist for the planetary body. It is also the Dimensional Doorway leading us to the Next Universal Cycle evolving us into our destiny as a fully Ascended Race of Beings. 
Bifurcation of Timelines
The vibratory critical mass with groups of people on earth will indeed be the deciding factor resulting in the frequency split through the different Timelines which are also dimensions of time and space. More cities and community living areas will reflect either a harmonized or discordant group vibration that will either repel or attract certain levels of Consciousness. The bifurcation of energies creates Ascending Hubs or descending hubs on the earth surface. Most Humans will be sharing the experience of intensified energies in these time splits as a sensation of instability, mystery and that anything can happen at the drop of a hat.
Those that may get stuck in the lower spiral of these dense energies will be repeating the old previous timeline along with the theme that astrologically was represented in the Eighteenth Portal of Consciousness known as the "Moon" in classic Tarot. (See article from January 2007).
Term first found: Page 42, HGS Manual