Definitions
1.AdjectiveEffectively conveying thought or feeling."expressive dancing; a gesture expressive of the utmost contempt"
2.AdjectiveConveying the speaker's emotions and/or attitudes, in addition to the denotative or literal meaning.
3.AdjectiveAble to represent a number of ideas or concepts."A programming language that is Turing complete is more expressive than one that is not."
4.NounAny word or phrase that expresses (that the speaker, writer, or signer has) a certain attitude toward or information about the referent.
5.NounA 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.