Adjective

(er)

Capable of producing great physical force.

Capable of withstanding great physical force.

fast moving water, wind, etc, which has a lot of power.

Determined; unyielding.

* , chapter=10

, title= The Mirror and the Lamp , passage=It was a joy to snatch some brief respite, and find himself in the rectory drawing–room. Listening here was as pleasant as talking; just to watch was pleasant. The young priests who lived here wore cassocks and birettas; their faces were fine and mild, yet really strong , like the rector's face; and in their intercourse with him and his wife they seemed to be brothers.}}

Highly stimulating to the senses.

Having an offensive or intense odor or flavor.

Having a high concentration of an essential or active ingredient.

(specifically) Having a high alcoholic content.

(grammar) Inflecting in a different manner than the one called weak, such as Germanic verbs which change vowels.

(military) Not easily subdued or taken.

(slang, US) Impressive, good.

Having a specified number of people or units.

(of a disease or symptom) (l) (very bad or intense)

* 2005 , Andrew Gaeddert, Healing Immune Disorders: Natural Defense-Building Solutions , North Atlantic Books, page 221:

Physicians may diagnosis influenza by a throat culture or blood test, which may be important if you have a particularly strong flu, if your doctor suspects pneumonia or a bacterial infection.

(mathematics, logic) Having a wide range of logical consequences; widely applicable. (Often contrasted with a statement which it implies.)

Adjective

(en-adj)

Very large or wide (literally or figuratively).

The Sahara desert is vast .

There is a vast difference between them.

Very great in size, amount, degree, intensity, or especially extent.

* {{quote-magazine, year=2012, month=March-April

, author=Anna Lena Phillips , title=Sneaky Silk Moths , volume=100, issue=2, page=172 , magazine=(American Scientist) citation , passage=Last spring, the periodical cicadas emerged across eastern North America. Their vast numbers and short above-ground life spans inspired awe and irritation in humans—and made for good meals for birds and small mammals.}}

(obsolete) Waste; desert; desolate; lonely.

* William Shakespeare, the Life and Death of Richard the Third Act I, scene IV:

the empty, vast , and wandering air