First time question...

At the risk of sounding ridiculous, I must say that this is my first pregnancy. 
I'm wondering if nausea alone is considered morning sickness, without physically being sick. The reason I ask is because they say after week 10, morning sickness should subside. But, I haven't ever been full-out sick. I'm just at 10 weeks and starting to get nausea. I'm wondering if this will go away, or if nausea stays around for the long haul?