Final answer:
A consonant sound is a speech sound that involves constriction or closure of the airflow using the lips, teeth, or tongue.
Step-by-step explanation:
A consonant sound is a speech sound in which the airflow is obstructed in some way, typically by the lips, teeth, or tongue. Unlike vowel sounds, which are produced with an open vocal tract, consonant sounds are characterized by constriction or closure. For example, the sound /p/ in 'pat' is a consonant sound because it involves a complete blockage of the airflow using the lips.
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