Minimal vs. Minimum

I received a question from the Peanut Gallery about the use of “minimum” as an adjective. Salim emailed me in response to my tip about replacing “most minimal” with “least” in the following:
Bad Example: As seen in the tornado chart, water saturation has the most minimal effect on the estimated overall recovery.

Salim asked: “What is the intrinsic difference between Minimal (adjective) & Minimum (noun & adjective)? And when should each one be used? The question is: what is the difference between the two adjectives?”

Yes, there are times when both “minimal” and “minimum” are used as adjectives, but they are not used interchangeably.

Good Example: Water saturation has a minimal effect on the estimated recovery, as seen on the tornado chart. Here “minimal” is an adjective modifying the noun “effect.”  Minimal effect means it has a very slight effect or the smallest effect.

In most cases where “minimum” is used as an adjective, it is part of a noun phrase, such as minimum speed, or minimum wage or minimum age. If you left off the noun, then “minimum” would become the noun.

When used as an adjective, “minimum” means “the least possible.”

So in my original tip example, you could use “minimum” to mean least: As seen in the tornado chart, water saturation has the minimum effect on the estimated overall recovery.

Basically the two expressions “a minimal effect” and “the minimum effect” mean the same thing, but “minimal” takes the indefinite article “a” while “minimum” takes the definite article “the.”
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Quote of the Day
“The real minimum wage is zero.”

– Thomas Sowell, American economist, b. 1930

4 Responses to “Minimal vs. Minimum”

  1. petrocomputing Says:

    Follow-up Question from Salim:
    Can you please give an example where the two adjectives cannot be used interchangeably?

    Answer:
    You would not say:
    “My son has a degree, but he is working for minimal wage.” You would say “minimum wage.”

    You would not say:
    “She decorated her house with minimum knick-knacks.” You would say “minimal knick-knacks.”

    Thus, they are not interchangeable as adjectives.

  2. Jay Tormey Says:

    Minimum seems to apply when a definite minimum has been established, as in minimum wage, or minimum donation. Minimal applies when there is no specific lowest allowable amount established.

  3. JV Says:

    So, in your opinion the sentence, “The difference is subtle, minimal”, wouldn’t be correct, right ?
    Would it be correct to say “The difference is minimal”?

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