| • | A long pole or spar, run out for the purpose of extending the
   bottom of a particular sail; as, the jib boom, the studding-sail boom,
   etc. | 
											
															| • | A long spar or beam, projecting from the mast of a derrick,
   from the outer end of which the body to be lifted is suspended. | 
											
															| • | A pole with a conspicuous top, set up to mark the channel in
   a river or harbor. | 
											
															| • | A strong chain cable, or line of spars bound together,
   extended across a river or the mouth of a harbor, to obstruct
   navigation or passage. | 
											
															| • | A line of connected floating timbers stretched across a
   river, or inclosing an area of water, to keep saw logs, etc., from
   floating away. | 
											
															| • | To extend, or push, with a boom or pole; as, to boom out a
   sail; to boom off a boat. | 
											
															| • | To cry with a hollow note; to make a hollow sound, as the
   bittern, and some insects. | 
											
															| • | To make a hollow sound, as of waves or cannon. | 
											
															| • | To rush with violence and noise, as a ship under a press
   of sail, before a free wind. | 
											
															| • | To have a rapid growth in market value or in popular
   favor; to go on rushingly. | 
											
															| • | A hollow roar, as of waves or cannon; also, the hollow cry of
   the bittern; a booming. | 
											
															| • | A strong and extensive advance, with more or less noisy
   excitement; -- applied colloquially or humorously to market prices, the
   demand for stocks or commodities and to political chances of aspirants
   to office; as, a boom in the stock market; a boom in coffee. | 
											
															| • | To cause to advance rapidly in price; as, to boom railroad
   or mining shares; to create a "boom" for; as to boom Mr. C. for
   senator. |