(metallurgy) A kind of tool steel, invented in the early 20th century, which retains its hardness and temper at high temperatures (at which previous kinds of tool steel would soften), thus allowing cutters made from it to be employed at higher cutting speeds than were previously practical.

(uncountable) Any or all of several formats of television system having a higher resolution than traditional ones / (countable) A television set that employs such a system

(idiomatic) Self-righteous; proceeding on the belief one is more correct or proper than others.

The early recorded form of the High German language, spoken from the 8th century to the 12th century.

Concerning the Old High German language.

Any of a class of lipoproteins that transport cholesterol to the liver from other tissue; high levels may decrease the risk of coronary heart disease.

Concerning the Middle High German language.

An ancestor to the modern (High) German language, spoken from 1050 to about 1500. Some linguists prefer to use 1350 as the end of the Middle High German period, calling the period from 1350 to 1650 Early New High German in a broad sense.

(programming) A programming language requiring a compiler to translate it into a form that a particular machine understands, focusing on user-friendly code development by automating core tasks such as accessing memory.

(literally) A mark, such as a line of seaweed, showing the highest level reached by a body of water.