expressive

Short definition from Wiktionary

Adjective

1. 1
   Effectively conveying thought or feeling.
2. 2
   Conveying the speaker's emotions and/or attitudes, in addition to the denotative or literal meaning.
3. 3
   Able to represent a number of ideas or concepts.

Noun

1. 1
   Any word or phrase that expresses (that the speaker, writer, or signer has) a certain attitude toward or information about the referent.
2. 2
   A word or phrase, belonging to a distinct word class or having distinct morphosyntactic properties, with semantic symbolism (for example, an onomatopoeia), variously considered either a synonym, a hypernym or a hyponym of ideophone.