In ElasticSearch, the concept which closely resembles an SQL table is called an index.
Compared to an SQL table, the index does not neccessarily need to have a predefined structure – the ElasticSearch index is more similar to a MongoDB collection.
However, an elasticsearch index has many features similar to SQL tables such as indices (which you typically don’t need to create explicity – ElasticSearch takes care of that for you).
Typically, indices contain lots of similar documents that have (mostly) the same properties.