1
- the subject of a talk, a piece of writing, a person's thoughts, or an exhibition; a topic题目, 主题：
the theme of the sermon was reverence
这次布道的主题是敬爱
a show on the theme of waste and recycling.
关于垃圾和回收主题的一次展览。
1.1
- Linguistics the first major constituent of a clause, indicating the subject-matter, typically being the subject but optionally other constituents, as in 'smitten he is not'.【语言学】主位, 主题。与RHEME相对。
1.2
- an idea that recurs in or pervades a work of art or literature（文艺作品的）主题（思想）。
1.3
- Music a prominent or frequently recurring melody or group of notes in a composition【乐】主题, 主旋律。
1.4
- as modifier(of music) frequently recurring in or accompanying the beginning and end of a film, play, or musical（音乐）主题曲：
a theme song.
主题歌。
1.5
- a setting or ambience given to a leisure venue or activity（休闲场所、活动的）主题, 格调：
a family fun park with a western theme.
具西方情调的家庭娱乐公园。
1.6
- as modifier denoting a restaurant or pub in which the decor and the food and drink served are intended to suggest a particular foreign country, historical period, or other ambience（餐馆、酒吧的）主题风格：
American theme restaurants.
具美国风格的餐馆。
1.7
- US an essay written by a school pupil on a set subject〈美〉（学生的命题）作文。
2
- Linguistics the stem of a noun or verb; the part to which inflections are added, especially one composed of the root and an added vowel【语言学】（名词、动词等的）词干。
3
- historical any of the twenty-nine provinces in the Byzantine empire〈史〉（拜占庭帝国的）行政区。
with obj.
- give a particular setting or ambience to (a leisure venue or activity)（休闲场所、活动）以…为主题：
as adj. themed Independence Day was celebrated with special themed menus.人们以特别主题的菜单来庆祝独立日。
词源
Middle English: via Old French from Latin thema, from Greek， literally 'proposition'; related to tithenai 'to set or place'.