The difference between Deficiency and Minus

When used as nouns, deficiency means inadequacy or incompleteness, whereas minus means a minus sign (−).

Minus is also preposition with the meaning: without.

Minus is also verb with the meaning: to subtract.

Minus is also adjective with the meaning: negative.

check bellow for the other definitions of Deficiency and Minus

Deficiency as a noun (uncountable):

Inadequacy or incompleteness.
Deficiency as a noun (countable):

An insufficiency, especially of something essential to health.
Deficiency as a noun (geometry):

The amount by which the number of double points on a curve is short of the maximum for curves of the same degree.
Deficiency as a noun (geometry):

The codimension of a linear system in the corresponding complete linear system.

Minus as a preposition (informal):

Without.

Examples:

"I walked out minus my coat''."

"synonyms: lacking without"
Minus as a preposition (mathematics):

less; reduced by.

Examples:

"seven minus two is five"

"ant plus"

Minus as an adjective (mathematics):

Negative.

Examples:

"a minus number"
Minus as an adjective:

On the negative part of a scale.

Examples:

"minus seven degrees"
Minus as an adjective (postpositive):

Ranking just below a designated rating.

Examples:

"He got a grade of B minus for his essay."