air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water
far more than usual or expected; "an extraordinary desire for approval"; "it was an over-the-top experience"
beyond what is ordinary or usual; highly unusual or exceptional or remarkable; "extraordinary authority"; "an extraordinary achievement"; "her extraordinary beauty"; "enjoyed extraordinary popularity"; "an extraordinary capacity for work"; "an extraordinary session of the legislature"
make a request or demand for something to somebody; "She asked him for a loan"
consider obligatory; request and expect; "We require our secretary to be on time"; "Aren't we asking too much of these children?"; "I expect my students to arrive in time for their lessons"
inquire about; "I asked about their special today"; "He had to ask directions several times"
direct or put; seek an answer to; "ask a question"
address a question to and expect an answer from; "Ask your teacher about trigonometry"; "The children asked me about their dead grandmother"
require or ask for as a price or condition; "He is asking $200 for the table"; "The kidnappers are asking a million dollars in return for the release of their hostage"
crowded with or characterized by much activity; "a very busy week"; "a busy life"; "a busy street"; "a busy seaport"
actively or fully engaged or occupied; "busy with her work"; "a busy man"; "too busy to eat lunch"; "the line is busy"
(of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; (`engaged' is a British term for a busy telephone line); "her line is busy"; "receptionists' telephones are always engaged"; "the lavatory is in use"; "kept getting a busy signal"
overcrowded or cluttered with detail; "a busy painting"; "a fussy design"
keep busy with; "She busies herself with her butterfly collection"
singled out for notice or especially for a dire fate; "a marked man"
strongly marked; easily noticeable; "walked with a marked limp"; "a pronounced flavor of cinnamon"
having or as if having an identifying mark or a mark as specified; often used in combination; "played with marked cards"; "a scar-marked face"; "well-marked roads"
a book (or manuscript) consisting of large sheets of paper folded in the middle to make two leaves or four pages; "the first folio of Shakespeare's plays"