Conforming to accepted standards
Not lewd or obscene
Being what is needed without being in excess
Of moderately good quality but less than excellent
Morally beyond reproach, especially in sexual conduct
Proper in appearance
In accordance with common standards
In accordance with the moral code
You can't be decent for two seconds, can you?
She looked decent in jeans and a long-sleeved shirt.
You're being decent right now.
Looks like you could use a decent meal.
Oh, and wear something decent this time.