Minera is a Spanish word that translates directly to "mine" in English. It is a feminine noun. The term commonly refers to a place where minerals are extracted from the earth, or an enterprise involved in mining activities. It can also refer to the actual extraction process itself.
In contexts related to resource extraction, minera may specifically designate a mining company or a mining operation. For instance, one might speak of "una compañía minera" (a mining company).
Figuratively, "minera" is less commonly used, but it can sometimes relate to the idea of discovering or extracting something valuable, not necessarily in a literal mining sense. This usage is less common than the primary meaning.