There are multiple definitions - click on the translation that matches your context.

mangel

substantiv

full

deficiency

noun

Definitions of deficiency

English

a mistake or fault in something that makes it not good enough

The report found management deficiencies at senior levels.

English

a negative aspect of someone's personality that makes that person not good enough

My teacher seems to care about his work, but he has many deficiencies.

English

when you do not have enough of something, especially something that your body needs

She announced measures to combat anaemia and Vitamin A deficiency.