(logic) The result of replacing parts of an argument with letters, leaving only logic words such as "if" and "for all" unreplaced.

Orbital riveting.

(databases) Any of various forms of a relational database providing criteria for determining a table's degree of vulnerability to logical inconsistencies and anomalies.

(grammar) A word that substitutes for words, phrases, clauses, or sentences, whose meaning is recoverable in context.

Behaviour which is contrary to social expectations, which is inappropriate or rude.

The basic form of a word used as a dictionary entry (of any part of speech, but especially of a verb).

Of recent origin.

(computing) A control character traditionally used to cause the printer to eject the current page of output and start a new page, more recently equivalent to a carriage return.

(astronomy) Describing a region of space in which new stars are being formed

A representation of a number in terms of powers of a base, such as the representation of 1234 as 4⨯16²+13⨯16+2⨯16⁰ or the representation of 2345 as 2000+300+40+5.