open up

verb

opened up; opening up; opens up

transitive verb

1
: to make available or possible
The discovery opens up the possibility of new cures.
2
: to make plain or visible : disclose
3
: to open by cutting into

intransitive verb

1
: to become available or possible
The hostess will let us know when a table opens up.
2
: to spread out or come into view
The road opens up ahead.
3
: to commence firing
4
: to become communicative
tried to get the patient to open up

Examples of open up in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Bill Burr, who is making his Broadway debut in the starry revival of David Mamet’s Pulitzer Prize-winning play Glengarry Glen Ross, opened up during a March 18 appearance on The Tonight Show Starring Jimmy Fallon about dealing with a particularly vocial audience member. Raven Brunner, People.com, 21 Mar. 2025 Ferreira sobs hysterically, spouts horrific recounts of an abusive childhood, and slowly opens up, all in the span of a two-hour film. Samantha Bergeson, IndieWire, 21 Mar. 2025 Demonstrating that cartilaginous jawed fish also have synovial joints opens up the questions of whether their–and our–common ancestor also had them. Elizabeth Rayne, Ars Technica, 21 Mar. 2025 The European Union has instructed Apple to further open up the iPhone's connectivity features so third-party devices like smartwatches and headphones can tap into certain iOS features. Jibin Joseph, PCMAG, 20 Mar. 2025 See All Example Sentences for open up

Word History

First Known Use

1582, in the meaning defined at transitive sense 1

Time Traveler
The first known use of open up was in 1582

Browse Nearby Words

Cite this Entry

“Open up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/open%20up. Accessed 24 Mar. 2025.

Kids Definition

open up

verb
1
: to make available
2
: to make visible or come into view
the road opens up ahead
3
: to begin firing (as with a weapon or with questions)
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!