determine

/dɪˈtɜːrmɪn/

Say it: dih-TUR-min

1. verb To find out or establish something exactly, typically through research or calculation.
The police are trying to determine the cause of the accident.
2. verb To be the decisive factor in; to cause something to happen in a particular way.
The size of the stadium will determine how many people can attend the concert.
3. verb To make a firm decision to do something.
After months of consideration, she determined to quit her job and travel.
4. verb To officially fix or settle the position, limits, or character of something.
A special committee was appointed to determine the new electoral boundaries.

📖 Seen in the wild

Scientists worked to determine the exact cause of the mysterious illness.
collected by @vocablast

✏️ determine in a sentence

Scientists use carbon dating to determine the age of ancient artifacts.
Your choices today will determine the course of your life tomorrow.
The court must determine whether the defendant is guilty beyond a reasonable doubt.
It is difficult to determine the best course of action without all the facts.
He was determined to succeed, no matter the obstacles.
The final score was determined in the last few seconds of the game.
We need to determine the key performance indicators for this project.

🔁 Synonyms & antonyms

ascertain establish decide discover verify confirm settle figure out control influence

ascertain · more formal, implies finding out with absolute certainty through investigation.

establish · suggests making a fact officially known and accepted.

decide · focuses on making a choice rather than discovering a fact.

discover · implies finding something that was previously unknown or hidden.

Opposites: guess, speculate, waver, hesitate, overlook

🌱 Where it comes from

The word 'determine' comes from the Latin 'determinare', meaning 'to set bounds to' or 'to fix a limit'. It's formed from 'de-' (off, from) and 'terminare' (to mark the end), the root of 'terminal'. This original sense of setting boundaries evolved into the modern meanings of fixing a result, settling a question, and making a firm resolution.

🧩 How it's used

Common patterns:

determine the causedetermine the outcomedifficult to determinegenetically determinedhelp determinedetermine the extent

While 'determine' and 'decide' can be synonyms, they have important nuances. Use 'determine' when you mean discovering a fact ('determine the cost') or when one thing causes another ('genes determine eye color'). Use 'decide' for making a choice ('decide where to eat'). The sense of 'making a firm resolution' (e.g., 'I determined to leave') is correct but can sound slightly formal or literary; in casual speech, 'I decided to leave' is more common.

Word family: determination, determined, determinant, determinable, predetermine

💬 Quick answers

What does 'determine' mean?

It most often means to figure something out for certain, like determining the cause of a problem. It can also mean to be the reason for a particular result, as in 'the weather will determine our plans'.

What is the difference between 'determine' and 'decide'?

'Determine' is often about discovering an objective fact or being a causal factor. 'Decide' is about making a choice between options. You determine the facts, and then you decide what to do.

Is 'determine' a formal word?

'Determine' is a neutral word that is suitable for both formal and everyday contexts. It is very common in academic, scientific, and professional writing.

What is the noun for 'determine'?

The most common noun is 'determination', which can mean the process of establishing something, or the quality of being resolute and firm in one's purpose.

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