Big Five are five broad factors (dimensions) of personality traits. They are:
Extraversion (sometimes called Surgency). The broad dimension of Extraversion encompasses such more specific traits as talkative, energetic, and assertive.
Agreeableness. Includes traits like sympathetic, kind, and affectionate.
Conscientiousness. Includes traits like organized, thorough, and planful.
Neuroticism (sometimes reversed and called Emotional Stability). Includes traits like tense, moody, and anxious.
Openness to Experience (sometimes called Intellect or Intellect/Imagination). Includes traits like having wide interests, and being imaginative and insightful.