Not able to be located; gone; absent; lost. (adjective)
To be running roughly due an occasional lack of a spark or other irregular fault (adjective)
Examples of word missing
More than 8,100 remain missing from the Korean War, and 1,779 from Vietnam.
With this accounting, 8,025 service members still remain missing from the conflict.
Owing to your world-view, you are sensitive to issues like under-representation and rightfully lament what you have witnessed all your life; poor people and more specifically, people of color for the most part are once again missing from the table.
More than 220 personnel from Florida alone remain missing from the Vietnam, Korea and Cold
The name, inspired by the phrase "missing in action," was revealed on the website of the New York Daily News.