lightproof

5.1

Not letting light pass through

adjective
/ˈlaɪtpruːf/

: a prueba de luz

So what I would do with her is put her in a separate room, you know, try to make it as soundproof, - lightproof as you can.

Examples

For the experiment, they needed to build a lightproof chamber to prevent any light from interfering with the results.
The artist used lightproof materials to ensure the photographs would not fade over time.
The lightproof curtains in the laboratory kept the workspace dark and suitable for sensitive measurements.

Synonyms

impenetrable

vslightproof

3 7.0

So thick that you cannot see through it

focuses on density allowing little light rather than absolute imperviousness

light-tight

vslightproof

1 6.8

Not letting light pass through

is the same meaning but expressed in different wording

opaque

vslightproof

1 4.7

An object that does not let light pass

stresses complete imperviousness to light rather than general non transparency

Antonyms

clear

866 1.0

Free from things that block sight or movement

transparent

54 3.2

Clear enough to see things behind it, like glass

How Opaque

lightproof

5.1

translucent

30 4.8

transparent

54 3.2

Surface Forms

lightproof positive

Morphology

lightproof = light + proof (transparent) = light + proof

A clear compound of 'light' + the productive combining element 'proof' meaning 'resistant to', so the meaning is directly derivable.

Etymology

Lightproof is made of light and proof, where proof means 'to keep out', like in waterproof. So something lightproof does not let light through and keeps light out.