C was originally created as a “high-level” language, being more abstract (aka high-level) than the other languages at the time. But now it’s basically considered very slightly more abstract than machine code when compared to the much higher level high-level languages we have today.

To add on to @azdle@news.idlestate.org 's comment, “High Level” in terms of programming languages means further away from how the computer processes things and “Low Level” means very similar to how machines process things. For example, binary and hexadecimal (16 bit) machine code such as “assembly language” are both low level.

Imagine if program interpreters were building blocks, then 6 layers of abstraction would be very tall or higher level.