1. The act of vocal expression; utterance or enunciation: an articulation of the group's sentiments.2a. The act or manner of producing a speech sound. b. A speech sound, especially a consonant. 3a. A jointing together or being jointed together. b. The method or manner of jointing. 4.Anatomya. A fixed or movable joint between bones. b. A movable joint between inflexible parts of the body of an animal, as the divisions of an appendage in arthropods. 5.Botanya. A joint between two separable parts, as a leaf and a stem. b. A node or a space on a stem between two nodes.