Full of expression; expressive.

An algebraic expression representing a function by binding one or more parameters to an expression which may contain those parameters.

An exploration mission to Mars launched in 2003 by the European Space Agency; consisted of the Mars Express Orbiter and the Beagle 2 lander.

The means by which one's personal characteristics are displayed; showing one's internal beliefs or character by means of external actions/changes.

(computing theory) A concise description of a regular formal language with notations for concatenation, alternation, and iteration (repetition) of subexpressions.

The expression or countenance that seems to an onlooker to be represented by the appearance of a person or animals's face, resulting from specific use of that person's facial muscles.

(mathematics) an expression that has been condensed and shortened, so that all the like terms have been combined

Language in any of a number of different modalities such as speech, sign or writing.

(genetics) The transcription and translation of a gene into messenger RNA and thus into a protein.

(chiefly US) A traffic lane on a limited-access road, intended for faster traffic, that has even more limited access.