Arabian peninsula has 2 different meanings across 2 categories:
a peninsula between the Red Sea and the Persian Gulf; strategically important for its oil resources
A peninsula in the Middle East, bordered by Jordan, the Syrian desert and Iraq to the north, the Persian Gulf to the northeast, the Gulf of Oman to the east, the Arabian Sea (part of the Indian Ocean) to the south (southeast), the Gulf of Aden to the south, the Red Sea to the west (southwest) extending north into the Gulf of Aqaba, and north along the Red Sea Rift to the Mediterranean Sea on the west (northwest). It consists mainly of Saudi Arabia, and may be geologically defined as the Arabian plate, also as the Arabian subcontinent.