One of The Six Stats, abbreviated as STR.
This is the stat that determines how strong a character is. This is usually broken down into two levels: how much a character can lift/carry/push/pull, and how damaging a blow from this character is. Of all the stats, this is the most historically blown-way-outta-proportion of all of the stats, and is usually the choice stat of an action or martial arts hero, and especially comic book characters - Strength is one of the defining characteristics of the Flying Brick.
Here's a guide for Examples:
12-15: The character is reasonably in-shape to athletic. The high-end stat-wielders are your typical good high-school athlete.
16-19: Professional athletes, fighters, etc. Expect most Olympian athletes to be pushing 18 or 19
20-23: These are the beginning of your super-heroes. Expect car-lifters to be common in this group, if not guys that make their own doors... through brick walls. Also expect a fight against a typical muggle to end with one punch - in that their skull will probably be a fine mist.
24+: So you've upgraded from lifting cars to juggling Abrams tanks, eh? These are your most-powerful superheroes, a LOT of mythical figures, and typically anyone who can wrestle a dragon.
- Batman, being a badass normal, pushes the upper-levels of this tier, shying just short of being able to regularly lift a car. This means he's still able to lift more and fight harder than Olympic-level weightlifters and grand-master martial-artists. Not surprising, though, since he is the poster-child for Badass Normal.
- The typical level of power for fighters in Baki the Grappler. As the comic goes on, it becomes more and more common for the fighters to kill mooks or bystanders with little effort, and sometimes even each other. At one point, Baki is thrown - not in one go, mind you, but through successive hits - through a series of concrete walls.
- Guts of Berserk has this simply by dint of being able to swing around a huge frigging slab of iron with one hand as if it were a more normal sword.
- The Goku of Dragon Ball can break the freakin' SUN with a single punch.
- Saitama of One-Punch Man. It's right there in the title: he kills everything with a single punch.
- Superman. Earth-2 Superman especially. He killed the Anti-Monitor with one punch for crissake!
- Captain Marvel. He has, on at least 2 occasions, gone toe-to-toe with Superman, with the Big Blue Boyscout pulling absolutely no punches. He is the only non-New-God, non-Kryptonian, non-Daxamite, other than Doomsday, to do this, by the way.
- Of the Six Stats, Strength is possibly the most common subject of Chuck Norris Facts - his roundhouse kick would key off of this stat.
- Any Mario character with Super Strength will generally be able to plow through six-foot walls and crush meteors with little effort. That applies to Mario, Luigi, Wario, and Bowser.