Definition of water elm
: any of several trees of the family Ulmaceae that prefer or thrive in a moist environment: such as
a
: american elm
b
: winged elm
c
: cedar elm
d
: planer tree
e
: a common Eurasian elm (Ulmus laevis) that closely resembles American elm
f
: a tall spreading Japanese tree (Zelkova serrata) sometimes cultivated as an ornamental
