importantly

adverb

im·​por·​tant·​ly im-ˈpȯr-tᵊnt-lē 

 especially Southern US and New England  -tənt-,

-dənt-

1

—used to say that what follows in a sentence is important

… much more importantly he stands a chance of having his publication barred …

—H. L. Mencken

2

a

: in an important way

… contributed importantly to the language of the field.

—Ernst Mayr

… the real story is importantly different from the one surmised.

—Alexander Woollcott

b

: in a self-important or pompous manner

… he talked importantly of the managerial position he had reached, after a lifetime of devotion and toil …

—William Trevor

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

Examples of importantly in a Sentence

Her research has contributed importantly to our understanding of the disease.

He strutted to and fro importantly, ordering everybody around.

Recent Examples on the Web

But most importantly, start investing in innovation and digital transformation now. —Joe Camberato, Forbes, 21 Mar. 2025

But more importantly, Republicans in Congress should unite, and then seek to find a few free-thinking Democrats, to effectuate what the administration will propose. —The Editors, National Review, 21 Mar. 2025

Most importantly, any dam removal plan must include comprehensive mitigation for impacts to our water intake system. —Courier-News, Chicago Tribune, 20 Mar. 2025

New backpackers often shop for the comfiest or cheapest backpacks and end up with gear that’s overbuilt, bulky, and most importantly, heavy. —Alice Bennett, Travel + Leisure, 20 Mar. 2025

Word History

First Known Use

1611, in the meaning defined at sense 2