a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
eellike aquatic North American salamander with small forelimbs and no hind limbs; have permanent external gills
an acoustic device producing a loud often wailing sound as a signal or warning
a warning signal that is a loud wailing sound
a sea nymph (part woman and part bird) supposed to lure sailors to destruction on the rocks where the nymphs lived; "Odysseus ordered his crew to plug their ears so they would not hear the Siren's fatal song"
the impression created by doing something unusual or extraordinary that people notice and remember; "it was in London that he made his mark"; "he left an indelible mark on the American theater"
a number or letter indicating quality (especially of a student's performance); "she made good marks in algebra"; "grade A milk"; "what was your score on your homework?"
the shortest of the four Gospels in the New Testament
a symbol of disgrace or infamy; "And the Lord set a mark upon Cain"--Genesis
a visible indication made on a surface; "some previous reader had covered the pages with dozens of marks"; "paw prints were everywhere"
a written or printed symbol (as for punctuation); "his answer was just a punctuation mark"
Apostle and companion of Saint Peter; assumed to be the author of the second Gospel
formerly the basic unit of money in Germany
make or leave a mark on; "the scouts marked the trail"; "ash marked the believers' foreheads"
designate as if by a mark; "This sign marks the border"
too small or unimportant to merit attention; "passed his life in an inconsiderable village"; "their duties were inconsiderable"; "had no inconsiderable influence"
so surprisingly impressive as to stun or overwhelm; "such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying"
a place for the burial of a corpse (especially beneath the ground and marked by a tombstone); "he put flowers on his mother's grave"
death of a person; "he went to his grave without forgiving me"; "from cradle to grave"
of great gravity or crucial import; requiring serious thought; "grave responsibilities"; "faced a grave decision in a time of crisis"; "a grievous fault"; "heavy matters of state"; "the weighty matters to be discussed at the peace conference"
dignified and somber in manner or character and committed to keeping promises; "a grave God-fearing man"; "a quiet sedate nature"; "as sober as a judge"; "a solemn promise"; "the judge was solemn as he pronounced sentence"