[iopuy]

At my company, and every other large company I have worked for titles absolutely have a fixed meaning. There are standard pay bands that are largely predicated on your title.

[crispyambulance]

_Within_ any one company, sure, "senior" may mean something.

But looking across companies... Nope. A "junior" could easily change jobs/employers and land on a "senior" title or vice-versa.