hollow

1 of 4

adjective

hol·​low ˈhä-(ˌ)lō 

hollower ˈhä-lə-wər  ; hollowest ˈhä-lə-wəst 

1

: having an indentation or inward curve : concave, sunken

hollow cheeks

2

: having an unfilled or hollowed-out space within

a hollow tree

3

: lacking in real value, sincerity, or substance : false, meaningless

hollow promises

a victory over a weakling is hollow and without triumph

—Ernest Beaglehole

4

: reverberating like a sound made in or by beating on a large empty enclosure : muffled

heard a hollow sound when he knocked on the wall

hollowly

ˈhä-lō-lē 

-lə-lē

adverb

hollowness noun

hollow

2 of 4

noun

plural hollows

1

: an unfilled space : cavity, hole

in the hollow of a tree

2

: a depressed or low part of a surface

especially : a small valley or basin

hollow

3 of 4

verb

hollowed; hollowing; hollows

transitive verb

1

: to remove the inside of : to make hollow (see hollow entry 1)

a hollowed tree

hollowing out pumpkins for Halloween

2

: to form by removing the inside of something : to form by making something hollow

—usually used with out

… rain barrels hollowed out from trees …

—Robert Shaplen

hollowing out a tunnel

intransitive verb

: to become hollow

his cheeks had hollowed

hollow

4 of 4

adverb

1

: so as to have a hollow (see hollow entry 1 sense 4) sound

The sound echoed hollow in the cave.

: in a way that reflects a lack of real value, sincerity, or substance

Their threats rang hollow.

2

: completely, thoroughly

—often used with all

"… Edward is always real glad to get some of the old farmhouse goodies. He says they beat city cooking all hollow, and so they do."

—Lucy Maud Montgomery

Synonyms of hollow

Adjective

• concave
• sunken

Noun

• hole
• dent
• cavity
• pit

Choose the Right Synonym for hollow

vain, nugatory, otiose, idle, empty, hollow mean being without worth or significance.

vain implies either absolute or relative absence of value.

vain promises

nugatory suggests triviality or insignificance.

a monarch with nugatory powers

otiose suggests that something serves no purpose and is either an encumbrance or a superfluity.

a film without a single otiose scene

idle suggests being incapable of worthwhile use or effect.

idle speculations

empty and hollow suggest a deceiving lack of real substance or soundness or genuineness.

an empty attempt at reconciliation

a hollow victory

Examples of hollow in a Sentence

Adjective

There was a hollow spot in the field.

there's a noticeably hollow spot in the mattress where he has been sleeping

Noun

The owls nested in the hollow of a tree.

made a little hollow in her mound of mashed potatoes and filled it with gravy

Verb

They hollowed the log to make a canoe.

Recent Examples on the Web

Adjective

The design uses a hollow double-walled architecture in which water flows continuously through internal channels, while propane and air mix separately before combustion. —Kaif Shaikh, Interesting Engineering, 25 May 2026

Spectacular amounts of energy kept his lobby art system generating, yet the result felt utterly hollow. —Emily Watlington, ARTnews.com, 24 May 2026

Noun

Also, check for hollows in trunks that may mean the interior portion is rotting. —Tom MacCubbin, The Orlando Sentinel, 24 May 2026

Some cavities were intentionally left hollow, while others were filled with materials like gelatin or foam. —Scott Travers, Forbes.com, 10 May 2026

Verb

Under the brows, her eyes were hollowed in heavy black shadow, while her lips were dressed in a matte nude hue thanks to makeup artist Linda Hallberg. —Kaleigh Werner, Footwear News, 22 May 2026

That, in the end, is what separates productive worry from the kind that hollows you out. —Angela Haupt, Time, 8 May 2026

Adverb

Whirlpool’s pledge to keep jobs in Amana rings hollow to laid off workers like Dawson. —Nathaniel Meyersohn, CNN Money, 19 Mar. 2026

The idea of Pax Americana has always rung hollow to some people, including citizens of countries that have been attacked by the United States itself. —Peter Harris, The Conversation, 28 Jan. 2026

Word History

Etymology

Adjective

Middle English holgh, holugh, holwe, formally identical with holgh hollow entry 2, with adjectival meaning apparently after hol, holle "hollow, sunken," going back to Old English hol — more at hole entry 1

Noun

Middle English holgh, holough "hole, burrow, hollow of the hand," going back to Old English holh "cavity, hole," going back to *hulha-, probably extended form of Germanic *hula- "hollow, sunken" — more at hole entry 1

Verb

Middle English holowghen, holowen, holwen, derivative of holgh, holwe hollow entry 1

Adverb

derivative of hollow entry 1

First Known Use

Adjective

13th century, in the meaning defined at sense 1

Noun

before the 12th century, in the meaning defined at sense 1

Verb

15th century, in the meaning defined at transitive sense 1

Adverb

1601, in the meaning defined at sense 1

Phrases Containing hollow

• have a hollow ring
• hollow out
• in the hollow of one's hand
• ring hollow

Rhymes for hollow

• follow
• malo
• swallow
• wallow
• apollo
• criollo

Kids Definition

hollow

1 of 2 noun

hol·​low ˈhäl-ō 

1

: an empty space within something : hole

2

: a low spot in a surface

especially : valley

hollow

2 of 2 adjective

1

: curved inward : sunken

hollow cheeks

2

: having a hole inside : not solid throughout

hollow tree

3

: lacking value, sincerity, or meaning

hollow victory

hollow promises

4

: being like a sound made in or by beating on a large empty enclosure : muffled

a hollow roar

hollow verb

hollowly

ˈhäl-ō-lē 

-ə-lē

adverb

hollowness noun

Medical Definition

hollow

noun

hol·​low ˈhäl-(ˌ)ō, -ə(-w) 

: a depressed part of a surface or a concavity

the hollow at the back of the knee