柯林斯詞典lacuna /l??kju?n?/ (lacunae) 1. N-COUNT If you say that there is a lacuna in something such as a document or a person's argument, you mean that it does not deal with an important issue and is therefore not effective or convincing. (文件、論點等中對重要問題的)缺漏[正式] 返回 lacuna劍橋詞典an absent part , especially in a book or other piece of writing （書或文章中）缺漏，脫漏，空白 返回 lacuna