I would not be able to explain to you what exactly it means as many professionals themselves rarely understand some of these terms from other closely related terms......In general/casual words it would mean that you are not having emotions to the degree that you are supposed to have i.e the amplitude of the emotional reaction to persons/events/relations is very much less than normally expected. Hope I have not confused you more!
One word of caution though on Internet and self diagnosis....... believe me, diagnosis is definitely not just about ticking a check list of criteria. You can probably tick weather you have some biological symptoms like lack of appetite
, disturbed sleep etc but when it comes to qualitative symptoms like anhedonia
, blunted affect, tangential thinking etc etc etc.....you better leave these to professionals. Experience does count for something, in every profession.
Hope you take my answer in the right spirit.