The word "Mama" is an interjection that means mother in many languages, including English. It can also be used as a term of affection or address towards one's own mother or any other woman who has acted as a mother figure to someone.
Usage examples
Call your mother and say, "Hey mama, how are you doing?"
In a conversation with a friend, mention, "My mama is the best cook. She makes the most delicious meals."
When introducing your mother to someone, say, "This is my mama. She's been my biggest supporter all my life."
Reflecting on a childhood memory, recall, "I remember running into my mama's arms whenever I got scared or hurt."
Sharing exciting news with your family, exclaim, "Guess what, mama? I got accepted into my dream college!"