English Reference

Word

spectral

Phoneticsspec·tral, stress on the first syllable

US/ˈspɛktɹəɫ/

UK/spˈɛktɹəl/

Definitions

01ghostly

C1 · Advanced Literary

adj. looking or sounding like a ghost; pale, thin, or not quite real.

adj. resembling or characteristic of a spectre; having a ghostly or ethereal quality. Often used in literary contexts to describe light or figures.

“The old house was filled with a strange, spectral light that made everyone feel uneasy.”

“The survivor emerged from the ruins with a spectral appearance, his face pale and his eyes hollow from the ordeal.”

Teaching tip

This sense is almost exclusively found in fiction or descriptive writing; it is rarely used in everyday conversation.

02relating to light/energy

C1 · Advanced Science Technical

adj. relating to the different colours or waves of light and energy.

adj. relating to a spectrum, particularly the distribution of energy or light across different wavelengths.

“Scientists used spectral analysis to find out what the distant star was made of.”

“The instrument measures the spectral signature of the gas, allowing researchers to identify specific chemical components with high precision.”

Usage

Usually appears before a noun in scientific phrases like 'spectral analysis' or 'spectral lines'.

Real-World Examples

“Swathes of the country were plunged into an eerie darkness as the spectral glow of the Sun's outer corona shimmered out from the edges of the shadowy Moon.”
The Local 13 Aug 2026
“She is haunted by Obsidia, a spectral child who comes to represent a version of herself.”
The Guardian 6 Aug 2026

Etymology

From spectre + -al.

From spectrum + -al.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

ADJECTIVE

spectral(C1)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Frequent
Level
C1 · Advanced
Updated

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English Reference