/depθ ||; dɛpθ/noun1 [C,U] the distance down from the top to the bottom of sth 深，深度（指由顶至底的距离）: The hole should be 3cm in depth. 那个孔应是3厘米深。
2 [C,U] the distance from the front to the back of sth 纵深（指由前至后的距离）: the depth of a shelf 搁架的深度 ☞picture at length 见length插图
3 [U] the amount of emotion, knowledge, etc that a person has （感情、知识等的）深度: He tried to convince her of the depth of his feelings for her. 他努力使她相信他对她情深一片。
4 [C] [usu.pl] the deepest, most extreme or serious part of sth 最深的部份；最极端的部份；最严重的部份: in the depths of winter (= when it is coldest) 在隆冬 ☞adjective deep 形容词为deep
in depth looking at all the details; in a thorough way 深入；彻底:
to discuss a problem in depth 深入地讨论问题 out of your depth 1 (Brit 英) in water that is too deep for you to stand up in 在水太深而不能站立的地方
2 in a situation that is too difficult for you 处于力所不及的情况: When they start discussing politics I soon get out of my depth. 他们开始讨论政治，我很快便茫然不知所云。