[ 'platəʊ ]
■ noun ( plural ~x -təʊz or ~s )
1》 an area of fairly level high ground.
2》 a state or period of little or no change following a period of activity or progress.
■ verb ( ~s , ~ing , ~ed ) reach a state of little or no change.
Origin
C18: from Fr., from OFr. platel , dimin. of plat 'level'.