How can I reload .emacs after changing it?

Question

How can I get Emacs to reload all my definitions that I have updated in .emacs without restarting Emacs?

Answer 1

I'm currently on Ubuntu 15.04; I like to define a key for this.
[M-insert] translates to alt-insert on my keyboard.
Put this in your .emacs file:

(global-set-key [M-insert] '(lambda() (interactive) (load-file "~/.emacs")))