Definition of table leaf in US English:

table leaf

noun

  • A section of a table, especially a movable leaf that can be used to increase the size of the table, as a drop leaf.

Origin

Late 17th century; earliest use found in Thomas Mace (?1613–?1706), musician and writer on music. From table + leaf.

Pronunciation

table leaf

/ˈteɪbl liːf/