bold

noun

: boldface

printed in bold

Word History

Etymology

First Known Use

circa 1871, in the meaning defined above

Phrases Containing bold

• (as) bold as brass
• be/make so bold
• bold-faced
• make bold

Rhymes for bold

• bowled
• cold
• doled
• foaled
• fold
• gold
• hold
• holed
• mould
• old
• poled
• polled

Kids Definition

bold

adjective

ˈbōld

1

a

: willing to meet danger or take risks : daring

b

: showing daring spirit

a bold plan

2

: impudent, saucy

3

: steep entry 1 sense 1

bold cliffs

4

: standing out in a very noticeable way : conspicuous

bold colors

5

: being or set in boldface

bold letters

boldly

ˈbōl-(d)lē

adverb

boldness

ˈbōl(d)-nəs

noun

Medical Definition

BOLD

abbreviation

blood oxygenation level-dependent; blood oxygen level-dependent

Note: BOLD is used to describe imaging signals and methods that measure changes in the magnetic properties of hemoglobin accompanying changes in blood oxygen levels. BOLD functional magnetic resonance imaging is dependent on oxygen levels and is used especially in the study of brain function to produce images showing blood flow indicative of neural activity.