High level languages are programming languages that at least try to be understandable.
Unfortunately, there’s quite a bit of variation on how much they succeed.
The most common example of a high level language is BASIC.
Some say the lack of features in this language is the reason that basic became an insult.
We say that BASIC is a basic attempt by programmers of the 60s to be understandable.
We also say that PowerShell is a much higher level language than you’re every likely to see, due to it’s verb-noun convention.