aboiteau -x or -s. abatteau, aboideau [< Cdn F] Maritimes
1 n. a dike (def. 1) or dam equipped with a gate which functions as a valve releasing flood water from behind but preventing sea water from entering at high tide.
See also: bito dike (def. 1) marsh dike
2 n. the sluice-gate, or valve, arrangement in the dike.