The extension of the research deadline allowed the team to complete additional field experiments before publication.
研究截止日期的延长使团队能够在发表前完成额外的实地实验。
A county extension officer states that years with more registered beekeepers always had more healthy colonies than years with fewer registered beekeepers.
From a Command of Evidence: Quantitative question · Information and Ideas
Which choice best defines “extension”?
C — The act of making something longer or larger. “extension” means the act of making something longer or larger.
Which word means “the act of making something longer or larger”?
A — extension. “extension” means the act of making something longer or larger.
extension — the act of making something longer or larger. In Chinese: 延长，扩展.
extension is pronounced /ɪkˈstɛnʃən/.
The extension of the research deadline allowed the team to complete additional field experiments before publication. (研究截止日期的延长使团队能够在发表前完成额外的实地实验。)
prolongation, expansion, lengthening — all close in meaning to extension (the act of making something longer or larger).
shortening, reduction — each the opposite of extension (the act of making something longer or larger).
Yes. extension is on the SAT Prep Basic list — the everyday academic words the SAT assumes you already have. The Digital SAT does not test vocabulary in isolation; words like this one are tested through Words in Context questions, where you choose the word that completes a passage most logically and precisely.