the act of breaking something into small pieces
"The falling vase made a loud noise before shattering into a thousand shards on the floor."
Gerund: The action of the verb to smash.
"The sound of smashing glass echoed through the hallway after he accidentally dropped his phone on the sidewalk."
present participle of smash
"The crowd cheered wildly as the singer smashed into the microphone stand during her energetic encore performance."
Serving to smash (something).
"The heavy hammer was smashing through the old wooden doorframe with a loud crack."