What is the term for changing the pitch of a note, such as pushing a guitar string upwards?

The term that best describes the action of changing the pitch of a note by pushing a guitar string upwards is "Pitch Bend." This technique is commonly used in various styles of music to create expressive effects. When a guitarist bends a string, they increase the tension on that string, which raises the pitch of the note being played.

"Pitch Bend" specifically refers to this action in a context where the change in pitch is recognized as a gradual and expressive modification. It’s often used in conjunction with other techniques, such as slides or vibrato, but the primary focus remains on altering the pitch of a sustained note.

While "Bend" also seems relevant, it is considered more informal and may not capture the entirety of the technique. "Glissando" typically refers to sliding from one pitch to another in a smooth manner rather than just bending one note. "Slide" often involves moving between pitches rather than adjusting the pitch of a single note upward or downward.