# ROI

Pronunciation: US say "ahr-oh-Y" /ˌɑɹ.oʊˈaɪ/; UK say "ah-roh-Y" /ˌɑː.ɹəʊˈaɪ/

## Noun

1. Initialism of return on investment. — Initialism of return on investment.
   - Simple: Initialism of return on investment. It shows how much money you make compared to what you spent.
   - _Investors demanded a clear ROI before committing further capital._
   - _The startup's marketing spend delivered an impressive ROI within six months._
3. Initialism of region of interest. — Initialism of region of interest.
   - Simple: Initialism of region of interest. It means an area that someone is watching closely.
   - _Analysts flagged the border crossing as a new ROI after the troop movements._
   - _The satellite passed over the ROI twice each day._
4. Initialism of route of administration. — Initialism of route of administration.
   - Simple: Initialism of route of administration. It means the way a medicine goes into the body.
   - _The label specified the recommended ROI as oral for adult patients._
   - _Bioavailability varies sharply depending on the ROI chosen._
5. Initialism of region of interest. — Initialism of region of interest, in digital images, microscopy: in 3-dim-specimen reconstructions by consecutive sectioning.
   - Simple: Initialism of region of interest. It means the small part of an image that is studied closely.
   - _The technician selected an ROI around the tumor before measuring its area._
   - _Stacking each ROI from the serial sections produced a three-dimensional model of the specimen._
6. Initialism of radius of influence. — Initialism of radius of influence.
   - Simple: Initialism of radius of influence. It means how far the effect of something reaches.
   - _The pumping test established an ROI of roughly thirty meters around the borehole._
   - _Beyond the ROI, the drawdown in the aquifer was barely measurable._
7. Initialism of release of information. — Initialism of release of information.
   - Simple: Initialism of release of information. It means letting someone see private records with permission.
   - _Without a completed ROI, the agency could not forward the case notes to the new caseworker._
   - _The parent signed an ROI authorizing the school to discuss the records with the therapist._

## Proper noun

2. Initialism of Republic of Ireland. — Initialism of Republic of Ireland.
   - Simple: Initialism of Republic of Ireland. It is a short way to write the country's name.
   - _Prices in the ROI are quoted in euros, not pounds._
   - _Customs forms listed the parcel's origin as ROI._

Source: DictionaryAI, https://dictionaryai.com/define/roi (written from Wiktionary data, CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/).