I stumbled upon a blog of Dave Thomas, a signer of the Agile Manifestor, where he very reasonably complains about the misuse of the word “agile” and misuse of the whole concept.

According to him, here is what it is all about:

What to do:

Find out where you are
Take a small step towards your goal
Adjust your understanding based on what you learned
Repeat

How to do it:

When faced with two of more alternatives that deliver roughly the same value, take the path that makes future change easier.

A good read:
http://pragdave.me/blog/2014/03/04/time-to-kill-agile/