presumptive

adjective

pre·​sump·​tive pri-ˈzəm(p)-tiv 

1

: based on probability or presumption

the presumptive nominee/winner

see also heir presumptive

2

: giving grounds for reasonable opinion or belief

A blood alcohol concentration of 0.08 percent is considered presumptive evidence of drunken driving in Louisiana for those 21 and older.

—Joe Gyan Jr.

He was admitted to the hospital with a presumptive diagnosis of cellulitis.

—Mary Jo Bonner

… health departments in 20 states reported 100 presumptive or confirmed human cases of arboviral disease …

—The Journal of the American Medical Association

3

: being an embryonic precursor with the potential for forming a particular structure or tissue in the normal course of development

presumptive retina

presumptively adverb

Synonyms

• plausible
• credible
• probable

Examples of presumptive in a Sentence

in that climate of fear, an accusation alone was presumptive evidence of guilt

Recent Examples on the Web

No doubt there were many reasons the Chiefs woke up the echoes and restored a certain sense of order on Sunday with a 37-20 clobbering of visiting Baltimore, a presumptive rival for the AFC berth in the Super Bowl. —Kansas City Star, 29 Sep. 2025

In Thursday’s Day One practice, Arvidsson took the injured Pastrnak’s place on the presumptive top line with Morgan Geekie and Elias Lindholm. —Steve Conroy, Boston Herald, 19 Sep. 2025

The presumptive ruling by a majority of a panel of five justices in Brazil's Supreme Court makes Bolsonaro the first former president in the country's history to be convicted for attacking democracy. —Ricardo Brito, USA Today, 11 Sep. 2025

Nailor was the presumptive replacement for Jordan Addison, who is suspended for the first three games of the season. —Trevor Squire, MSNBC Newsweek, 27 Aug. 2025

Word History

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing presumptive

• heir presumptive

Rhymes for presumptive

• consumptive

Medical Definition

presumptive

adjective

pre·​sump·​tive pri-ˈzəm(p)-tiv 

1

: expected to develop in a particular direction under normal conditions

presumptive regions of the blastula

2

: being the embryonic precursor of

presumptive neural tissue

3

: giving grounds for reasonable opinion

a presumptive diagnosis of dengue

presumptive or confirmed cases of communicable disease

Legal Definition

presumptive

adjective

pre·​sump·​tive pri-ˈzəmp-tiv 

1

: based on presumption : presumed to have occurred

a presumptive violation of law

2

: giving grounds for reasonable opinion or belief

presumptively adverb