(linguistics, history) The ancestor language of Modern English, also called Anglo-Saxon, spoken in most of Britain from about 400 to 1100.

Something or someone puzzling, mysterious or inexplicable. / A riddle, or a difficult problem.

Synonym of Shakespearean sonnet

(historical) A small portable electro-mechanical rotor machine used to encrypt and decrypt secret messages, made famous by Germany in WWII.

present participle of engineer

(uncountable) The application of mathematics and the physical sciences to the needs of humanity and the development of technology. / The area aboard a ship where the engine is located.

The ancient or older language of Modern English, spoken in England and parts of Scotland (where it became Lowland Scots) from about 1100 AD to 1500 AD. It developed from Anglo-Saxon, also called Old English, with heavy influence from French and Latin after the Norman invasion.

(astronautics) a type of spacecraft propulsion, whereby electric fields accelerate ions out the exhaust to provide motive force

One who designs and implements software solutions.

(transitive) To supply with light. / (transitive, figuratively) To make something clear to (someone); to give knowledge or understanding to.