The tagline of the Hibernate Search project has been "Apache Lucene integration" - at least in the reference documentation.
Since we're widening the scope of integrations, we need to update these.
The README especially needs updating, but as far as I remember that content is also copied into several other introductions to the project (website, openhub, etc...)
From face to face brainstorming:
Full-text search for Java objects.
followed by either:
Transparent synchronization between Hibernate ORM entities and indexing services like Apache Lucene,
Elasticsearch[, Apache Solr].
Event-driven index synchronization. Transparent integration with Hibernate ORM.
Friendly API to Apache Lucene or Elasticsearch.