The meaning of longing is a strong desire especially for something unattainable : How to use longing in a sentence. A longing for peace and quiet (definition of longing from the cambridge academic content dictionary © cambridge university press)
Definition of longing noun in oxford advanced learner's dictionary. If you feel longing or a longing for something, you have a rather sad feeling because you want it very much. Filled with longing for home.
A sudden longing to see old friends. It is an emotion characterized by a strong sense of craving, longing, or pining for a particular experience, person, place, or even a past time. Longing often arises when there is a perceived sense of loss,.
There are four meanings listed in oed's entry for the noun longing, one of which is labelled obsolete. See examples of longing used in a sentence. A longing is a strong feeling of need or desire for someone or something.
If you're stuck in detention and all of your friends are outside enjoying a sunny day, you might be looking out the window with longing.