Sleepy vs. Tired

Do sleepy & tired mean the same thing? My husband and I have had this argument a few times. So, I asked Webster (http://www.m-w.com/)... Basically, they mean the same thing. If you are exhausted and fatigued, then you are ready to fall asleep. Same meaning! See for yourself:

Definition of SLEEPY

 : ready to fall asleep b : of, relating to, or characteristic of sleep

 

Definition of TIRED

 

: drained of strength and energy : fatigued often to the point of exhaustion

: obviously worn by hard use : run-down