I would like to alias my ls command, but there is a previously defined alias for it which I believe gets invoked first before my definition! I am using .zshrc to define my alias, and here is what I did:

alias ls="ls --classify --almost-all --group-directories-first"

And here is the alias command output:

$ alias | grep "ls="
ls='ls --color=tty'

Is there any possible actions to see where that another alias has been defined? Or overwrite it with the new one?

Note: I use ZSH, and I've already searched for it in .profile and other related files I knew might help. If there is any file I need to check, comment please.