Characteristics of Sotàpanna person (Stream Enterer) What are the characteristics of Sotàpanna person (Stream Enterer). Can Sotàpanna person live at a home with a family (married life) without going to a monastery and stay without being a monk...
The Pali Canon definition of a stream entrant is one who have abandoned the first three fetters namely


Self View
Skeptical Doubt
Clinging to rites and rituals


(There are 10 fetters, all of which must be broken before enlightenment)

So quoting from the Alagaddupama Sutta


  Monks, in this Teaching that is so well proclaimed by me and is plain,
  open, explicit and free of patchwork, those monks who have abandoned
  three fetters, are all stream-enterers, no more liable to downfall,
  assured, and headed for full Enlightenment.


Perhaps more helpfully it's been described to me as the point at which a someone cannot fall back on the path. Forward is the only direction they will go. It is like reaching escape velocity. Until you get out of the gravity well of samsara there is always the possibly of falling back to Earth. The stream entrant no longer feels that gravitational pull so will not fall back (apologies to Newton for the analogy).

More poetically reaching stream entry has been been described as the turning about in the deepest seat of consciousness. 

Regarding family life and being a stream entrant - there is no obligation to join a monastery or be a bhikku or monk. There are apparently 3000 lay stream entrants named in the Pali Canon. Sangharakshita, the founder of the Buddhist group that I belong to says that stream entry is a realistic aim for anyone seriously engaged in the spiritual life irrespective of lifestyle. Not to say that it wouldn't take a great deal of commitment of course.