"New" lesions simply means they didn't show up earlier.

If the new lesions were inflammed, they'd show up as "enhanced" with gad enhancement. Yours are not inflammed/enhanced, so they would not be considered "active", but are instead "plaque" (like scar tissue) or "old" (even if they are new since the last MRI).

Since you have 3 "new" lesions, that aren't enhanced, it seems to indicate that you had some new inflammation activity between the last MRI and this one. Sometimes we are aware of new activity because we have an outward attack, and other times we aren't because we have no new symptoms crop up.

Cherie