An elevator in a dream tends to speak to change that's moving faster than you feel ready for -- a promotion, a status shift, or a life stage arriving ahead of schedule. A smooth ride can reflect ease with that pace, while a stuck or plunging elevator often points to a loss of control over how quickly things are unfolding.
When the three superiour planets shall be conjoined in regal signs, it is termed a great conjunction; and when the Sun beholds them, they make most potent and flourishing kingdoms. - William Lilly (1602.-1681.)