1 [I,T] to grow slowly, increase, or change into sth else; to make sb/sth do this （使）成长；（使）发育；发展 [I] to develop from a child into an adult 由儿童长大成人 [T] a scheme to help pupils develop their natural talents 帮助学生发展天赋的计划Scientists have developed a drug against this disease. 科学家已经研制出一种治疗这种疾病的药物。Over the years, she's developed her own unique singing style. 这些年来，她已经形成自己独特的唱歌风格。

2 [I,T] to begin to have a problem or disease; to start to affect sth 开始出现（问题）；患上（疾病）；开始影响（某物） [T] to develop cancer/Aids 患上癌症╱艾滋病Trouble is developing along the border. 边境开始出现麻烦。

3 [T] to make an idea, a story, etc clearer or more detailed by writing or talking about it more 更详尽阐述；使展开；发挥: She went on to develop this theme later in the lecture. 她在讲课中接着更详尽地阐述了这个主题。

4 [T] to make pictures or negatives from a piece of film by using special chemicals 冲洗（照片）: to develop a film 冲洗胶卷

5 [T] to build houses, shops, factories, etc on a piece of land 开发（土地，在上面兴建房屋、商店、工厂等）: This site is being developed for offices. 这工地现正兴建办公楼。