1.AdjectiveMade for use by businesses or manufacturers, as opposed to home consumers, and therefore typically larger, stronger, more difficult to operate, and less attractive in appearance.
"The office was now large enough to need an industrial strength vacuum cleaner."
2.AdjectiveUnusually large or potent.
"That's one industrial strength cockroach! I'll need the industrial strength bug spray."
3.NounAbility or capacity, as related to industry.
"It was many decades before the war-ravaged country regained its industrial strength."