Practice
Delirious: meaning, tone, and examples in English
Sign in to saveAfter a high fever, Amir was delirious and spoke as if he were still at work. At the stadium, fans were delirious with joy after the final goal. The same word can describe very different situations, so context matters.
Use delirious accurately for a confused mental state and recognise its informal meaning of extremely excited or happy.
Read and practice
Read the examples and try the written questions in this guide. Listening recordings are not available for this lesson yet.
Try the written questions
They were delirious with joy. /ðeɪ wə dɪˈlɪriəs wɪð dʒɔɪ/
The short answer
Delirious usually means severely confused and unable to think clearly. It can also mean extremely excited or happy in an informal context.
By midnight, he was delirious with exhaustion.
Why it works: With exhaustion points to confusion caused by an extreme physical state.
5 more examples
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The nurse said the patient seemed delirious after two sleepless nights.
This is the serious sense: the person's thinking appears confused.
Not this:The patient seemed
tiredafter two sleepless nights. What changes: Tired describes fatigue; delirious adds serious confusion. -
We were delirious with relief when the missing dog came home.
Relief makes the informal, highly emotional meaning clear.
Not this:We were
relievedwhen the missing dog came home. What changes: Relieved is calmer and more neutral. -
After the race, I was so exhausted that I felt delirious.
Extreme exhaustion can be the cause of confusion.
Not this:After the race, I was
exhausted. What changes: Exhausted alone does not say that thinking was affected. -
The crowd was delirious when the singer returned for one more song.
A celebrating crowd uses the informal sense of intense excitement.
Not this:The crowd was
cheerfulwhen the singer returned. What changes: Cheerful is positive but much less intense. -
His delirious remarks made it hard to follow the conversation.
Here the remarks sound confused or disconnected.
Not this:His
unusual remarksmade it hard to follow the conversation. What changes: Unusual does not necessarily suggest mental confusion.
Read the full guide
Start by looking for the cause or feeling around delirious. Fever, medication, dehydration, exhaustion, and confusion usually signal the health-related sense. Joy, excitement, and celebration often signal the informal sense. Do not use delirious as a general replacement for happy.
The central meaning: confused thinking
In its main sense, delirious describes a temporary state of serious confusion. A person may not know where they are, may speak unclearly, or may react to things that are not happening. The word often appears with causes such as fever, illness, dehydration, medication, or extreme lack of sleep.
The child became delirious with fever during the night.
The fever explains why delirious means confused here, not happy.
Does delirious mean calm or confused in a sentence about a high fever?
It means confused.
The informal meaning: intensely excited
In informal contexts, delirious can describe excitement that feels almost uncontrollable. It is common with crowds, celebrations, unexpected good news, and strong relief. This use is expressive, so it suits lively conversation, reviews, and narratives more than neutral business writing.
The team was delirious after winning the final.
The victory makes the excited meaning clear.
I was delirious with happiness when I got the scholarship.
Read the words around it
A phrase after with often helps you choose the meaning. Delirious with fever and delirious with exhaustion normally describe confusion. Delirious with joy, delight, or excitement normally describe a powerful positive feeling. The wider situation matters too.
After three days without sleep, he sounded delirious.
Without sleep points to a loss of clear thinking.
Which meaning fits delirious with delight?
It means extremely happy or excited.
Choose a word with the right strength
Delirious is an intense word. Use happy, pleased, or excited for ordinary positive feelings. Use confused, disoriented, or incoherent when you need a more specific description of unclear thinking. In health-related writing, accuracy is usually more useful than dramatic language.
She was delighted to receive the invitation.
Delighted fits strong pleasure without suggesting an extreme or uncontrolled state.
He seemed disoriented after the accident.
Build natural sentences with delirious
Put delirious after a linking verb such as be, become, feel, look, seem, or sound. Follow it with with and a noun when you want to name the cause or emotion. The word can also come before a noun, as in delirious excitement or delirious remarks, but that style is more literary.
She sounded delirious with excitement on the phone.
Sounded describes how she seemed to the listener; with excitement gives the reason.
Complete the pattern: They were delirious ___ joy.
Use with: They were delirious with joy.
Before you go
Remember this
Delirious can describe serious confusion or, informally, overwhelming excitement. Read the cause and the situation before choosing the word. Use it for an extreme state, not for everyday happiness.
Practice with the written examples
You can practice with the written questions in the Learn tab. Each answer includes an explanation.
Try the written questionsListening test not available yet
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Try the written questionsQuestions about "Delirious: meaning, tone, and examples in English"
What does delirious mean?
Delirious usually means seriously confused and unable to think or speak clearly. In informal contexts, it can also mean extremely excited or happy. The cause and situation show which meaning is intended.
The nurse said the patient seemed delirious after two sleepless nights.
Is delirious a positive word?
It can be positive when it describes a crowd or person who is wildly happy, but its central health-related meaning is serious. Words such as fever, exhaustion, or confusion normally point to that serious sense.
The patient seemed tired after two sleepless nights.
What is the difference between delirious and delighted?
Delighted means very pleased. Delirious means an extreme, almost uncontrolled state, either confused or intensely excited depending on context. Delighted is usually the safer choice for ordinary good news.
We were delirious with relief when the missing dog came home.
Can I say delirious with joy?
Yes. Delirious with joy is an expressive phrase for being overwhelmingly happy. It works best for a dramatic or memorable moment, rather than a small everyday pleasure.
We were relieved when the missing dog came home.
How do I pronounce delirious?
Pronounce it de-LIR-i-ous, with the main stress on LIR. It has four syllables: de-lir-i-ous.
After the race, I was so exhausted that I felt delirious.