领域lǐngyù 1.一个国家行使主权的区域。{territory; domain; realm; area in which a state exercises its sovereignty} 2.学术思想或社会活动的范围{field; sphere; realm; domain; range of academic thinking or social activity}: 思想～{ideological sphere}|生活～{field in life}|在自然科学～内,数学是最重要的基础。{Mathematics is at the foundation of the natural sciences.}