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Being on the airplane: Your dream falls under the category of "flying dreams", in which however you are not flying under your own power. Such dreams are associated with a major change in your life, a rise in status or a transitional phase. In general, airplane dreams represent some sort of change. However, for you, this change may cause you to be isolated from the rest of the group, i.e. friends, family, colleagues, etc. You are literally flying high on your own. It is sometimes said that it can be lonely atthe top and in some way your dream is depicting this.
Elevator: To dream that you are ascending in an elevator represents a rise to status and wealth. You may have risen to a higher level of consciousness and are looking at the world from an elevated viewpoint. If the elevator is moving upward in an out of control fashion or it crashes through the roof, then it indicates that you are being catapulted to a position of power in which you do not yet know how to deal with. You are afraid of the new responsibilities ahead for you. Descending in an elevator suggests that you are being grounded or coming back down to reality. It also signifies setbacks and misfortunes.
Hotel: To see a hotel in your dream signifies a new state of mind or a shift in personal identity. You are undergoing some sort of transition and need to move away from your old habits and old way of thinking. You need to temporarily escape from your daily life. Alternatively, the dream may imply a loss in your personal identity.