determine

American  

[dih-tur-min] / dɪˈtɜr mɪn /

verb (used with object)

determined, determining

1. to conclude or ascertain, as after reasoning, observation, etc.

   Synonyms:

   verify

2. to settle or decide (a dispute, question, etc.) by an authoritative or conclusive decision.

   Synonyms:

   adjust, resolve

3. to cause, affect, or control; fix or decide causally.

   Demand for a product usually determines supply.

   Synonyms:

   influence

4. to give direction or tendency to; impel.

   Synonyms:

   incline, lead, induce

5. Geometry. to fix the position of.

6. Logic. to limit (a notion) by adding differentiating characteristics.

7. Chiefly Law. to put an end to; terminate.

8. to lead or bring (a person) to a decision.

9. to decide upon.

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verb (used without object)

determined, determining

1. to come to a decision or resolution; decide.

2. Chiefly Law. to come to an end.

determine British  

/ dɪˈtɜːmɪn /

verb

1. to settle or decide (an argument, question, etc) conclusively, as by referring to an authority

2. (tr) to ascertain or conclude, esp after observation or consideration

3. (tr) to shape or influence; give direction to

   experience often determines ability

4. (tr) to fix in scope, extent, variety, etc

   the river determined the edge of the property

5. to make or cause to make a decision

   he determined never to marry

6. (tr) logic to define or limit (a notion) by adding or requiring certain features or characteristics

7. (tr) geometry to fix or specify the position, form, or configuration of

   two points determine a line

8. law to come or bring to an end, as an estate or interest in land

9. (tr) to decide (a legal action or dispute)

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determine Idioms  

1. see bound and determined.

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Usage

What does determine mean? Determine means to conclude, as after reasoning or observing, as in After considering all my options, I’ve determined which college I want to attend. Generally, to determine something is to come to a conclusive decision from a place of authority on the subject. Determine can also mean to cause or control, as in How much homework my teacher assigns will determine whether I can go to the game tonight. Determine is also used to mean to give direction to, as a boss might determine what tasks their employees will do. Example: I have determined that the cause of death was cardiac arrest.

Other Word Forms

• interdetermine verb (used with object)
• quasi-determine verb
• redetermine verb
• undetermining adjective

Etymology

Origin of determine

First recorded in 1350–1400; Middle English, from Old French determiner, from Latin dētermināre “to mark out and fix boundaries,” equivalent to dē- prefix indicating separation + termināre “to bound, limit”; de-, terminate

Explanation

If you determine something, you figure it out or settle a question, like when, after checking paws and hands, you determine that it's not the dog that ate your candy stash, but your kid sister. Determine comes from the Latin for "bring to a close," and when you determine something, you have closed all the questions you have about it and are quite sure you know the answer. If you become a detective, you'll have to determine who did the crime. After working through a mathematical problem, you determine the value of X. Determine can also mean influence. Your childhood spent in your grandmother's delightful kitchen might have determined your future career as a baker.

Example Sentences

How would the US determine who paid Iran a toll?

From BBC • Apr. 12, 2026

The team wanted to determine whether these variants also disrupt GLP-1, a hormone produced in the gut that helps control blood sugar after meals by stimulating insulin release, slowing stomach emptying, and reducing appetite.

From Science Daily • Apr. 12, 2026

Oil futures were little changed ahead of weekend talks between the U.S. and Iran that could determine whether the Middle East cease-fire holds.

From The Wall Street Journal • Apr. 10, 2026

Negotiations beginning this weekend will determine how long the cease-fire will last, and whether oil prices will come back down.

From Barron's • Apr. 10, 2026

Bobby, Bisguier, and about twenty other players and spectators stood around the tournament director’s desk as he applied the tie-breaking system to determine the winner.

From "Endgame" by Frank Brady

Related Words

• ascertain
• check
• demonstrate
• detect
• establish
• figure out
• learn
• see
• tell
• verify
• work out