Depends on context.
Mujer by itself means Woman.
Mi Mujer (My woman) really means "My wife"
This is for the ladies.
Mujeres. (moo-heh-res)
"Acusan a las mujeres" means "they accuse the women" in English.
mujeres
You can say "zapatos para mujeres".
las mujeres
Mujeres desnudas.
"The women" in Spanish is "las mujeres".
¿Donde están mis mujeres?
"Tantas mujeres hermosas!"
tres mujeres jóvenes
The women don't have rice.