condition of heightened watchfulness or preparation for action; "bombers were put on alert during the crisis"
very attentive or observant; "an alert and responsive baby is a joy"; "caught by a couple of alert cops"; "alert enough to spot the opportunity when it came"; "constantly alert and vigilant, like a sentinel on duty"
(usually followed by `to') showing acute awareness; mentally perceptive; "alert to the problems"; "alive to what is going on"; "awake to the dangers of her situation"; "was now awake to the reality of his predicament"
not unconscious; especially having become conscious; "the patient is now awake and alert"
incomprehensibility resulting from irrelevant information or meaningless facts or remarks; "all the noise in his speech concealed the fact that he didn't have anything to say"
the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience; "modern music is just noise to me"
a loud outcry of protest or complaint; "the announcement of the election recount caused a lot of noise"; "whatever it was he didn't like it and he was going to let them know by making as loud a noise as he could"
sound of any kind (especially unintelligible or dissonant sound); "he enjoyed the street noises"; "they heard indistinct noises of people talking"; "during the firework display that ended the gala the noise reached 98 decibels"
electrical or acoustic activity that can disturb communication
the act of exploding or bursting something; "the explosion of the firecrackers awoke the children"; "the burst of an atom bomb creates enormous radiation aloft"
a golf shot from a bunker that typically moves sand as well as the golf ball
a sudden outburst; "an explosion of laughter"; "an explosion of rage"
a violent release of energy caused by a chemical or nuclear reaction
the noise caused by an explosion; "the explosion was heard a mile away"
a sudden great increase; "the population explosion"; "the information explosion"
a hemoprotein composed of globin and heme that gives red blood cells their characteristic color; function primarily to transport oxygen from the lungs to the body tissues; "fish have simpler hemoglobin than mammals"
any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response
know and comprehend the nature or meaning of; "She did not understand her husband"; "I understand what she means"
perceive (an idea or situation) mentally; "Now I see!"; "I just can't see your point"; "Does she realize how important this decision is?"; "I don't understand the idea"
believe to be the case; "I understand you have no previous experience?"
make sense of a language; "She understands French"; "Can you read Greek?"