# spectral

/ˈspɛktɹəɫ/ (US) · /spˈɛktɹəl/ (UK)

Source: https://englishreference.com/word/spectral
Updated: 2026-08-08

## Senses

### 1. ghostly

adjective · CEFR C1 · Literary

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

For teachers: 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.

### 2. relating to light/energy

adjective · CEFR C1 · Technical

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

For teachers: 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'.

## Examples

- A spectral figure appeared in the window of the old house.
- The moonlight cast a spectral glow over the abandoned graveyard, making every shadow look like a spirit.
- The scientist used a prism to analyze the spectral composition of the light, identifying the specific wavelengths emitted by the distant star.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.