A pad of paper for preliminary notes or sketches or writings, etc.(noun)
A piece of temporary memory to hold details of a current conversation, usually scratchpad memory.(noun)
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Use "scratchpad" in a sentence
"Another new feature within Windows Live Local called Collections allows users to share "scratchpad" maps customized with photos tied to specific landmarks and locations."
""scratchpad" which will hopefully ensure that all changes will be noted."
"His mind was a scratchpad and he couldn't read his own writing."