/aj"euhr/ , n.
1. Also called double tide . Oceanog.
a. a high tide in which the water rises to a certain level, recedes, then rises again.
b. a low tide in which the water recedes to a certain level, rises slightly, then recedes again.
2. (in ancient Roman building) an earthen mound or rampart, esp. one having no revetment.
[ 1350-1400; ME: heap, pile ag- AG- + -ger, base of gerere to carry, bring ]