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People and feelings

earnest

/UR-nist/ adjective, noun

1Serious and sincere in what you say, feel or try to do

Earnest definition: sincere, serious, and meaning every word

People and feelingsAdjectiveNounUpdated 26 Oct 2026

The usual earnest definition is serious and sincere, showing real feeling and effort rather than joking or pretending. A volunteer who spends every weekend cleaning a river and talks about it with quiet passion is earnest.

English actually has two separate words spelled earnest. The common one is the adjective (and the phrase in earnest). The other is an older noun meaning a pledge or deposit, which survives in the property term earnest money. Both are covered here.

Entry at a glance

  • Meaning

    Sincere and serious; also a pledge or deposit
  • Part of speech

    Adjective; noun
  • Pronunciation

    UR-nist (US), UR-nist or ER-nist (UK)
  • Word forms

    earnestly, earnestness
  • Origin

    Adjective from Old English eornoste, "zealous, serious"; the pledge noun is a different word from Old French erres
  • Opposite

    flippant, joking, insincere, half-hearted
  • Register

    Neutral; slightly formal in writing

Earnest definition and meaning, one sense at a time

To define earnest properly, separate four uses you will meet:

  1. Adjective: sincere and serious. An earnest apology, an earnest student, an earnest attempt. The person truly means it.
  2. In earnest (phrase): seriously, for real. "The rain began in earnest" means it started to pour properly. "Are you in earnest?" means "Are you serious?"
  3. Noun: a pledge or token. Something given as a sign that more will follow, as in "an earnest of good faith". This is literary today.
  4. Earnest money: a deposit. Money paid to show you are serious about buying, especially a house.

Earnest in example sentences

  • The new trainee was earnest about learning every step of the process.
  • After months of planning, work on the bridge began in earnest this spring.
  • He spoke earnestly to the class about road safety after the accident near the gate.
  • Her earnestness won over a sceptical panel of judges.
  • We placed earnest money with the agent the day our offer was accepted.
Your younger brother writes you a long, careful letter explaining why he wants to study music, with a list of reasons and a savings plan. He is not trying to be clever or funny. He is earnest: open, sincere and serious about his goal.

Can earnest sound like criticism

Mostly earnest is praise for sincerity. But people sometimes use it with a slight smile, to suggest someone is too serious, lacking humour or a little naive. "An earnest young man lecturing everyone about recycling" can sound gently mocking. The opposite risk is sarcasm or facetious remarks, which say things you do not mean. Earnest people say exactly what they mean.

Earnest money in property deals

In buying a home, especially in the United States, earnest money is a deposit the buyer pays after an offer is accepted. It shows the seller that the buyer is serious, so the seller can take the home off the market. The money is usually held by a neutral party in escrow. If the sale closes, it normally goes toward the down payment or closing costs. If the buyer walks away without a reason allowed by the contract, the seller may be entitled to keep it. Contract terms, called contingencies, decide when it is refunded, for example after a failed inspection or if a mortgage is not approved.

This is a general explanation, not financial or legal advice. Rules and amounts vary by place and contract, so check with a qualified agent or lawyer before you sign.

Two different origins

The adjective goes back to Old English: eornoste meant zealous or serious, and the noun eornost meant seriousness or zeal. The adjective is recorded in Middle English from the early 1300s. The pledge noun is unrelated. It came from Old French erres and Latin arra, a deposit, a word probably of Semitic origin. Its Middle English form was ernes, and the final t, added in the 1400s, is not part of its real history; the spelling simply drifted toward the other earnest.

Earnest compared with close words

Sincere, serious or solemn
WordDifference
earnestSincere and serious, with feeling and effort
sincereHonest; means what it says, but less about effort
solemnSerious and formal, often grave or ceremonial
zealousVery eager, sometimes too intense

A person with conviction or integrity is often earnest, though not every earnest person is right. More character words are in people and feelings.

Frequently asked questions

Is earnest a compliment?

Generally so. Sincerity and effort are what it praises. In some contexts it can gently suggest a person is overly serious or lacks a sense of humour.

What does in earnest mean?

It means seriously or properly. "The work began in earnest" means it truly got going. "I am in earnest" means "I am not joking".

What is earnest money?

It is a deposit a home buyer pays to show a serious intention to buy. It is usually held in escrow and credited toward the purchase at closing, but it may be lost if the buyer backs out without a valid contract reason.

How do you use earnestly in a sentence?

Earnestly means in a sincere, serious way. For example: "She earnestly asked the council to fix the streetlights before winter."

Is earnest related to the name Ernest?

They are cousins. The name reached English from German Ernst, built on an old Germanic word for seriousness that is related to Old English eornoste. That shared sound is why puns on the two keep turning up.

What is the opposite of earnest?

Flippant, insincere, frivolous or joking. Half-hearted is an opposite when earnest refers to effort.