encyclopedic

If someone has encyclopedic knowledge of a subject, they know a huge amount about it, almost like a walking encyclopedia. It is more than just being well-informed; it suggests detailed and wide-ranging knowledge. You might use it for a historian who has studied one period for decades, or for a fan who knows every album, date, and story about a band. The word usually praises someone for knowing a subject in a very full and impressive way.

The word encyclopedic describes something remarkably comprehensive and detailed, resembling the scope and thoroughness of an encyclopedia. It goes beyond simply being knowledgeable; it suggests a vast, organized, and almost exhaustive understanding of a particular subject or field.

Originally derived from the Greek words for "complete circle" (enkyklos) and "instruction" (paideia), encyclopedias were historically intended to encompass all known knowledge. Therefore, something described as encyclopedic is not just broad in scope, but also very detailed.

You might say a scholar has an encyclopedic memory if they can recall facts and information with incredible precision. A collection of antique maps could be called encyclopedic if it covers every region of the world with exhaustive detail. It's often used to praise someone's expertise, implying their knowledge is so complete that it feels like consulting a reference work.

However, encyclopedic can also be used ironically or critically. Someone who insists on knowing everything about trivial matters might be described as having an encyclopedic knowledge of useless facts.

So, whether admiring a deep understanding or playfully pointing out excessive detail, encyclopedic always suggests a level of completeness and thoroughness that is truly remarkable, or perhaps delightfully obsessive.