Dream Symbols in The Dream Encyclopedia

by James R. Lewis and Evelyn Dorothy Oliver
A missing article, such as a set of keys, denotes a sense of being out of control.

A missed plane, bus, train, appointment, or time commitment can symbolize a missed opportunity, and the frustration of being behind and unorganized is also suggested. (See also Loss of Something).

My Dream Interpretation

by myjellybean
A missing article in a dream, like a piece of clothing or textbook, suggests you are feeling out of control in some aspect of your life.

Dream Dictionary Unlimited

by Margaret Hamilton
See “lost”