llenar un hueco

1.
General Spanishneutral
- To fill a physical gap or hole; to put material into a space that is empty or incomplete.
2.
General Spanishneutralinformal
- To fill a gap in a collection, series, or set by obtaining or adding an item that was missing.
- To supply something lacking in a person's life, routine, or emotional experience; to remedy a perceived void.
3.
General Spanishneutralbusiness
- To meet an unmet need in a market; to occupy an unserved niche or provide a product or service that fills a demand.

Examples:

ES: Bueno, ¿qué hace la gente para llenar un hueco en sus vidas?
EN: Well, what do people do to fill up the hole in their lives?
ES: ¿Lo compras para llenar un hueco en tu colección?
EN: Are you buying this to fill a hole in your collection?
ES: Dijiste que la estaba usando para llenar un hueco de mi vida, y tienes razón.
EN: You said that I was using her to fill a hole in my life, and you're right.
ES: Tiene que llenar un hueco en el mercado.
EN: It has to fill a hole in the marketplace.