v.tr.
1. make rich or richer.
2 make richer in quality, flavour, nutritive value, etc.
3 add to the contents of (a collection, museum, or book).
4 increase the content of an isotope in (material) esp. enrich uranium with isotope U-235.
Derivatives:
enrichment n.
Etymology: ME f. OF enrichir (as EN-(1), RICH)