important

adjective

im·​por·​tant im-ˈpȯr-tᵊnt 

especially Southern US and New England -tənt, 

-dənt

1

a

: marked by or indicative of significant worth or consequence : valuable in content or relationship

an important member of the team

Exercise is important for good health.

b

: deserving serious attention

made several important points

2

: giving evidence of a feeling of self-importance

answered in an important manner

3

obsolete : importunate, urgent

Importantly vs. Important: Usage Guide

A number of commentators have objected to importantly as a sentence modifier (the use defined above at sense 1) and have recommended important instead. Actually, both the adverb and the adjective are in reputable standard use in this function. Important is always used with more or most.

had bronze weapons and composite bows; more important, they utilized the horse and war chariot

—Harry A. Gailey, Jr.

second and most important, the book contains no important woman character

—F. Scott Fitzgerald

Importantly is commonly used in similar contexts, but it is somewhat more flexible in not requiring more or most.

sticks and, just as importantly, unsticks easily

—Phoebe Hawkins

importantly, the leaven in the mixture is quality

—George O'Brien

Synonyms of important

• major
• significant
• historic
• big

Examples of important in a Sentence

Diet and exercise are important for health.

In his editorial, he made several important points.

Scientists have made an important discovery.

Doing her job well is important to her.

He's one of the most important scholars in his field.

Recent Examples on the Web

On the other hand, religion is an important source of human connection…. — Marc Ramirez, USA Today, 3 July 2026

In Digital Systems One of the immune system's most important jobs is deciding what belongs and what does not. — Abhik Biswas, Forbes.com, 2 July 2026

This is particularly important as the European Union gears up to demand better transparency from the fashion industry, one of the world’s largest sources of carbon emission, accounting for up to 10 percent. — Roy Stephen Canivel, Footwear News, 2 July 2026

In that sense, Cronin proved his involvement was indeed just as important as the IP itself. — Alison Foreman, IndieWire, 2 July 2026

Word History

Etymology

Middle English importante, from Medieval Latin important-, importans, present participle of importare to signify — more at import entry 1

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing important

• all-important
• self-important

Rhymes for important

• unimportant

Kids Definition

important

adjective

im·​por·​tant im-ˈpȯrt-ᵊnt 

-ənt

1

: having great meaning or influence : significant

an important day to remember

our most important product

an important change

2

: having power or authority

an important leader

3

: believing or acting as if one's importance is greater than it really is

importantly adverb