intransitive verb
Definition: To make a continuous, low sound, often like a humming or buzzing noise, or to play a stringed instrument lightly.
Example: He likes to thrum on his guitar while sitting on the porch.
noun
Definition: A loose end or tuft of thread, or a sound that is made by something vibrating or beating.
Example: The thrum of the guitar filled the room with music.
transitive verb
Definition: To play a stringed instrument in a simple or repetitive way, or to sew or cover something with short pieces of thread or yarn.
Example: He decided to thrum his guitar while waiting for his friends to arrive.