upper surface

/ˌʌpər ˌsʌrfəs/
IPA guide

Other forms: upper surfaces

Definitions of upper surface
  1. noun
    the side that is uppermost
    see moresee less
    types:
    ceiling
    the overhead upper surface of a covered space
    overhead
    (nautical) the top surface of an enclosed space on a ship
    type of:
    side
    an extended outer surface of an object
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