名詞 overture:

1. orchestral music played at the beginning of an opera or oratorio
2. something that serves as a preceding event or introduces what follows
   同義詞：preliminary, prelude
3. a tentative suggestion designed to elicit the reactions of others
   同義詞：advance, approach, feeler

1. The audience must be in their seats before the overture.
   觀眾必須于序曲演奏前入座。

o.ver.ture

n.（名詞）
Music
【音樂】
An instrumental composition intended especially as an introduction to an extended work, such as an opera or oratorio.
器樂前奏曲：一種器樂樂曲，尤被用作長作品（如一部歌劇或圣樂的導(dǎo)言部分）
A similar orchestral work, such as one written as a concert piece or an introduction to a play.
序曲，序樂：一種類似的管弦樂曲，如譜寫的作為合唱篇或話劇的前奏曲的此類樂曲
An introductory section or part, as of a poem; a prelude.
序詩：如一首詩的介紹中性的片斷或部分；序言
An act, an offer, or a proposal that indicates readiness to undertake a course of action or open a relationship.
主動表示：指出準(zhǔn)備好了采取行動或揭示關(guān)系的一個措施、提議或建議
v.tr.（及物動詞）
o.ver.tured,o.ver.tur.ing,o.ver.tures
To present as an introduction or a proposal.
提建議：把作為導(dǎo)言或提議提出
To present or make an offer or a proposal to.
向…提議或建議

來源：
Middle English [opening]
中古英語 [開始]
from Old French
源自 古法語
from Vulgar Latin *ôpertôra
源自 俗拉丁語 *ôpertôra
alteration influenced by Latin côperore [to cover]
受 拉丁語 côperore的影響 [覆蓋]
of Latin apertôra
拉丁語 apertôra的變化
from apertus [past participle of] aperore [to open] * see wer- 4
源自 apertus [] aperore的過去分詞 [開始] *參見 wer- 4