theme

The definition of a theme is a topic, a recurring idea or a short melody.

(noun)

An example of theme is a lecture about environmental protection. series.
An example of theme is someone using the same color to decorate throughout their home.
An example of theme is a song that's played at the beginning of each episode of a television series.

See theme in Webster's New World College Dictionary

noun

1. a topic or subject, as of a lecture, sermon, essay, etc.
2. a recurring, unifying subject or idea; motif, often one used decoratively
a short essay, esp. one written as an assignment in a school course
1. a short melody used as the subject of a musical composition
2. a musical phrase upon which variations are developed
☆ theme song

Origin: ME < OFr & L: OFr teme < L thema < Gr, what is laid down < base of tithenai, to put, place: see do

transitive verb themed, theming

to give a theme to; specif., to plan according to a central theme: a themed restaurant

See theme in American Heritage Dictionary 4

noun

A topic of discourse or discussion. See Synonyms at subject.
A subject of artistic representation.
An implicit or recurrent idea; a motif: a theme of powerlessness that runs through the diary; a party with a tropical island theme.
A short composition assigned to a student as a writing exercise.
Music The principal melodic phrase in a composition, especially a melody forming the basis of a set of variations.
Linguistics A stem.
Linguistics See topic.