high-grade

IPA/ˌhaɪ ˈɡreɪd/
IPA/ˌhaɪ ˈɡreɪd/

high-grade — adjective

1. made from materials or methods that are clearly better than what is usually avai

1.adjectiveC1
Definition

made from materials or methods that are clearly better than what is usually available, so the final product is more valuable, more reliable, or longer-lasting.

Example

The watchmaker uses only high-grade Swiss steel for the gears inside each timepiece.

attributive: high-grade + material noun

Paloma chose a high-grade olive oil for the salad dressing she served at the dinner.

high-grade + food product

Common collocations
  • high-grade steel
  • high-grade fuel
  • high-grade equipment
  • high-grade materials
Synonyms
  • premium

    common in marketing language for the most expensive tier of a product

  • top-quality

    everyday spoken alternative; less technical than high-grade

  • superior

    more formal; often compares two specific items rather than a whole class

Antonyms
  • low-grade

    direct opposite; cheaper materials, weaker performance

  • inferior

    broader; can describe people, work, or products

Grammar Patterns

high-grade + noun

Usage Note

Almost always attributive (placed before a noun); rarely used after 'be'. Common with materials (steel, copper, oil), foods, fuels, and technical components.

Common Mistakes

These plates are high-grade.
These are high-grade plates.
'high-grade' normally sits before the noun, not after 'be'.
a high-grade student
a top student
'high-grade' describes products or materials, not people.

2. in medical contexts, describing a disease, tumour, or fever that is at the more

2.adjectiveC2
Definition

in medical contexts, describing a disease, tumour, or fever that is at the more dangerous end of its scale and likely to spread quickly or cause serious harm.

Example

Doctors confirmed that Yan had a high-grade tumour that needed immediate chemotherapy.

domain medical: high-grade + tumour

The child arrived at the clinic with a high-grade fever of nearly forty degrees.

high-grade + fever

Common collocations
  • high-grade tumour
  • high-grade fever
  • high-grade infection
  • high-grade lymphoma
Synonyms
  • aggressive

    common in cancer reports; emphasises rapid growth

  • severe

    broader; works outside medicine too

  • advanced

    often refers to the stage rather than the biological grade

Antonyms
  • low-grade

    milder form of the same condition, slower-growing

Grammar Patterns

high-grade + medical noun

Usage Note

Restricted to medical reports and clinical speech; distinguishes a more aggressive form of a condition from its 'low-grade' counterpart. Distinguish from sense 1: this sense never describes manufactured goods.

Common Mistakes

She felt high-grade today.
She had a high-grade fever today.
'high-grade' modifies the illness or symptom, not the person.

Word family

Synonym discussion

Sense: adjective/1

All four words mark something as standing above the ordinary, but their typical homes differ. 'High-grade' sits most comfortably with industrial or technical nouns — steel, fuel, copper, ore — where the upgrade is measurable. 'Premium' belongs to marketing copy and packaging: premium coffee, premium membership, premium economy seats. 'Top-quality' is the most everyday spoken option and works with almost anything from ingredients to service. 'Superior' is the most formal and often appears in side-by-side comparisons: 'this model is superior to the older version'. Compare: a chef boasts of 'top-quality tomatoes' on the menu, an airline sells you a 'premium' ticket, an engineer specifies 'high-grade aluminium' on the blueprint, and a reviewer writes that one phone is 'superior' to its rival.

high-grade ↗premium ↗top-qualitysuperior ↗

Common collocations

Nouns

Phrases

  • high-grade quality
  • high-grade product

Etymology

LatinFrenchEnglish

A modern English compound formed in the late nineteenth century by joining the adjective 'high' (meaning superior in rank or value) with the noun 'grade' (a level or class on a scale, borrowed from French 'grade' from Latin 'gradus' meaning 'step'). The compound spread first through industrial and commercial writing — descriptions of ore, steel, and machinery — and was later adopted in medicine to label the more dangerous end of a disease scale.