a wave resulting from the periodic flow of the tides that is caused by the gravitational attraction of the moon and sun
an unusual (and often destructive) rise of water along the seashore caused by a storm or a combination of wind and high tide
an overwhelming manifestation of some emotion or phenomenon; "a tidal wave of nausea"; "the flood of letters hit him with the force of a tidal wave"; "a tidal wave of crime"
with relatively high volume; "the band played loudly"; "she spoke loudly and angrily"; "he spoke loud enough for those at the back of the room to hear him"; "cried aloud for help"