con

¹ American  

[kon] / kɒn /

adverb

1. against a proposition, opinion, etc..

   arguments pro and con.

---

noun

1. the argument, position, arguer, or voter against something.

   The pros of the library project are obvious, but we have to consider the cons as well.

con ² American  

[kon] / kɒn /

verb (used with object)

conned, conning

1. to swindle; trick.

   That crook conned me out of all my savings.

2. to persuade by deception, cajolery, etc..

   Don't worry, I can always con my dad into letting me use his car.

---

noun

1. a confidence game or swindle.

   By the time my uncle realized she was playing a con on him, she had already left town with his rare coin collection.

2. a lie, exaggeration, or glib self-serving talk.

   He had a dozen different cons for getting out of paying traffic tickets.

adjective

1. relating to or involving abuse of confidence.

   a slick con man;

   a con trick.

con ³ American  

[kon] / kɒn /

noun

Slang.

1. a convict.

   Her brother's a con up in Elmira.

---

con ⁴ American  

[kon] / kɒn /

noun

Informal.

1. a convention, especially one for fans of a particular type of popular culture.

   sci-fi, gaming, and anime cons.

---

con ⁵ American  

[kon] / kɒn /

verb (used with object)

conned, conning

1. to learn; study; peruse or examine carefully.

   She's been conning her grandfather's medical diaries for months.

2. to commit to memory.

   I have conned the state capitals in alphabetical order, from Albany to Trenton.

---

con ⁶ American  

[kon] / kɒn /

Or conn

verb (used with object)

conned, conning

1. to direct the steering of (a ship).

   conning the freighter into port.

---

noun

1. the station of the person who cons.

   You will assume the con, ensign.

2. the act of conning.

   Storms from the northeast made for a difficult con.

con ⁷ American  

[kon] / kɒn /

verb (used with object)

British Dialect.

conned, conning

1. to strike, hit, or rap (something or someone).

   We think he was conned with a cricket bat.

2. to hammer (a nail or peg).

   Who knew conning tacks into the new carpet would take so long?

3. to beat or thrash (a person) with the hands or a weapon.

   He conned the poor guy in the pub for no apparent reason.

---

con- ⁸ American  

1. variant of com- before a consonant (exceptb, h, l, p, r ) and, by assimilation, before n: convene; condone; connection.

---

con. ⁹ American  

abbreviation

1. concerto.

2. conclusion.

3. connection.

4. consolidated.

5. consul.

6. continued.

7. against.

---

Con. ¹⁰ American  

abbreviation

1. Conformist.

2. Consul.

---

con ¹ British  

/ kɒn /

noun

1. 1. short for confidence trick

   2. ( as modifier )

      con man

---

verb

1. (tr) to swindle or defraud

con ² British  

/ kɒn /

noun

1. an argument or vote against a proposal, motion, etc

2. a person who argues or votes against a proposal, motion, etc

---

con ³ British  

/ kɒn /

verb

1. (tr) to direct the steering of (a vessel)

---

noun

1. the place where a person who cons a vessel is stationed

Con. ⁴ British  

abbreviation

1. Conservative

---

con ⁵ British  

/ kɒn /

noun

1. slang short for convict

---

con ⁶ British  

/ kɒn /

verb

1. archaic (tr) to study attentively or learn (esp in the phrase con by rote )

---

con ⁷ British  

/ kɒn /

preposition

1. music with

---

con- ⁸ British  

prefix

1. a variant of com-

---

Etymology

Origin of con¹

First recorded in 1575–85; short for Latin contrā “in opposition, against”

Origin of con²

An Americanism first recorded in 1895–1900; by shortening of confidence

Origin of con³

First recorded in 1715–25; by shortening

Origin of con⁴

First recorded in 1940–45; by shortening

Origin of con⁵

First recorded before 1000; Middle English cunnen, Old English cunnan, variant of can ¹ in sense “become acquainted with, learn to know”

Origin of con⁶

First recorded in 1350–1400; earlier cond, apocopated variant of Middle English condie, condue, from Middle French cond(u)ire, from Latin condūcere “to conduct”

Origin of con⁷

First recorded in 1890–95; perhaps akin to French cognée “hatchet,” cogner “to knock in, drive (a nail) home”

Origin of con-⁸

From Latin

Origin of con.⁹

From the Latin word contrā

Explanation

A con, or confidence game, is a swindle — when you take advantage of someone's trust. If you con someone out of their life savings, you might wind up a con — as in convict. The word con has many meanings, none of them good. An argument has pros and cons, and the cons are always the downside. An ex-con is someone who spent time in jail as a convict, and a con artist is someone who scams people out of their money.

Example Sentences

“Instead of donating the millions of dollars he raised, he ran his own con game,” Clayton said.

From The Wall Street Journal • Apr. 15, 2026

Several countries have enacted anti-cyberscam laws to combat the rise of online fraud, romance and cryptocurrency scams, with con artists in Singapore facing 24 strokes of the cane for serious cases.

From Barron's • Apr. 3, 2026

But nothing could have been further from the truth because the con continued.

From BBC • Feb. 23, 2026

"He was a con man. And while I was conned, I have done nothing wrong and have nothing to hide."

From BBC • Feb. 18, 2026

“Gale does not like hearing about nonbelievers and con artists. She herself was once a witch, you see.”

From "The House of Hades" by Rick Riordan

Related Words

• bamboozle
• bilk
• dupe
• hoodwink
• swindle
• wheedle