The answer to the question is complicated by the nature of the answer.
For some people (read Irish people) Ireland was never a "British Isle" but rather a self-contained archipeligo adjacent to another geopolitical entity called Great Britain and its islands. For those people the term is an anachronistic legacy of the imperial geography of the 19th century reflecting imperial politics that has no relevance in the 21st Century and is a term that should be dropped, just like the term 'Third Reich', and be replaced with a more inclusive term for the set of islands.
For others (read some British people, for whom the distinction is not important) it hasn't - the British Isles are all of the islands, irrespective of political affiliation.
If the archipeligo was named the Irish Isles the term might be in greater dispute and therefore some have advanced the term "British and Irish Isles".
Some people argue that the term is only geographical but get surprisingly upset at the suggestion that it is imperial geography, and that they should use a term that recognises the Irish presence, and the fact that for Irish people Ireland is not a British island.
Historically and politically, the state of Ireland broke with Westminster (London) in 1919 with a Declaration of Independence and was partitioned by treaty in 1921. This state then started out as the 'Free State', and broke from the United Kingdom in 1937 as Ireland/Éire (AyReh : i.e. AyReland), and formally confirmed its divorce in 1949. One could say that the term became defunct in the Republic of Ireland in 1921 as the Irish could formally object to their inclusion within that term, whereas Northern Irish people of British identity can continue to use the term.
315000 square kilometres. This includes Ireland, which geographically is part of the British Isles.
The Republic of Ireland is geographically part of the British Isles.
Ireland
The Republic of Ireland.
Ireland is in the British Isles, but is not a part of the United Kingdom.
The British Isles often refers to places that are not part of the UK, mainly the Republic of Ireland. So not all of the British Isles are in the UK.
Ireland.
Ireland
Eire - or southern Ireland. Although it's part of the British Isles (being 'attached' to Northern Ireland) it's separate from the United Kingdom.
Geographically, the British Isles are the islands of Britain and Ireland and all of their off-shore islands.
The two main British Isles are Great Britain and Ireland. Great Britain comprises three countries: England, Scotland, and Wales, while Ireland is divided into the Republic of Ireland and Northern Ireland. These islands are located off the northwest coast of mainland Europe and are part of the larger British Isles archipelago.
Ireland, a European country, shares a border with Northern Ireland, and Northern Ireland is part of the British Isles - so Ireland is the nearest European country. The next one would be France, which is on the other side of the English Channel.