Ghayr Mahram or Nâmahram.
Literally: Who is not familiar or intimate.
As a Sharî’ah term: Used especially of those men and women, who are not mahram and therefore are debarred from social relations with each other. Mahrams are clearly and definitely stated in the Qur’an as follows:
Mahrams of a woman:
Her father, her father-in-law, her son, her husband’s son from his previous wife, her brother, her nephews, her grand-nephews, her paternal and maternal uncle, her milk brother, her mothers and fathers uncles (paternal and maternal).
Mahrams of a man:
His mother, his daughter, his sister, his paternal and maternal aunt, his nieces, his grandnieces, his milk mother, his milk sister, his mother-in-law, his wife’s daughter from her previous husband, his son’s wife, his mothers and fathers aunts (paternal and maternal).