Single

adjective
  1. One in number; not accompanied by others; solitary. adjective
    She bought a single rose for the occasion.
    He lives in a single room apartment.
  2. Unmarried or not involved in a romantic relationship. adjective
    He has been single for three years.
    She enjoys being single and independent.
  3. A song or track released separately from an album, often to promote the album. noun
    The band released a new single last week.
    Her latest single topped the charts.
  4. A hit in baseball that allows the batter to reach first base. noun
    He hit a single to right field.
    The player scored a run with a single.
  5. To choose or distinguish from others; to select or pick out. verb
    She was singled out for her exceptional performance.
    The teacher singled him out for special praise.