A soul train can refer to two related ideas, depending on context:

• A cultural concept: a movement or journey animated by authentic, soulful energy—often used metaphorically to describe a collective, vibrant progression driven by passion and emotional depth.
• A historic TV show: Soul Train was a groundbreaking American music and dance program (1971–2006) that showcased Black music, fashion, and dance, helping bring soul, R&B, funk, and later hip-hop to a wide audience.

If you’re asking in a linguistic or metaphorical sense, a “soul train” emphasizes moving forward with heart, groove, and sincerity, often as a shared experience—like a community coalescing around music, dance, and culture. If you mean the television show, it was influential for its format (the “soul train line” where dancers showcased moves), its curated performances by Black artists, and its lasting impact on music television and style.