A state of Nigeria in the South South geopolitical zone. Capital: Asaba. Largest city: Warri. / A census-designated place and unincorporated community in Clay County, Alabama.

The Delta variant of COVID-19.

The fourth letter of the modern Greek alphabet Δ, δ. / A landform at the mouth of a river where it empties into a body of water.

(cryptography) To calculate the differences between the characters in an enciphered text and the characters a fixed number of positions previous.

plural of delta

Acronym of Diploma in Teaching English to Speakers of Other Languages, an advanced qualification to teach English, higher than the CELTA, accredited by the University of Cambridge.

present participle of delta

simple past tense and past participle of delta

(music) A form of blues originating in the Mississippi Delta region of the United States, generally featuring minimal instrumentation and song structure.

A brass alloy consisting of copper (55%), zinc (41-43%) and iron (1-3%), with the balance consisting of various other metals. The proportions used make the material harder and suitable for valves and bearings.