A former British mandate on the east coast of the Mediterranean; divided between Jordan and Israel in 1948 WordNet 3.0 & Open English WordNet

Mandatory Palestine was a geopolitical entity that existed between 1920 and 1948 in the region of Palestine under the terms of the League of Nations Mandate for Palestine. Wikipedia

A geopolitical entity under British administration Wikipedia Disambiguation

League of Nations Mandate in the Middle East under British administration Wikidata

A geopolitical entity under British administration, originally consisting of what is now Israel, Judea, Samaria, (the West Bank), and Jordan, which existed from 1920 to 1948. In 1922, the Trans-Jordan Memorandum established the Emirate of Transjordan in the area of Mandatory Palestine east of the Jordan River. In 1946, the Emirate of Transjordan formally became the country of Jordan, officially removing the area from Mandatory Palestine. Wiktionary

The British League of Nations Mandate for Palestine, of which this region was a part (the remainder being Transjordan, which covered approximately the lands of the modern Kingdom (originally Emirate) of Jordan). Wiktionary