Merriam-Webster's Collegiate® Dictionary, 11th Edition
SHOWER
I. noun
Etymology: Middle English shour, from Old English scūr; akin to Old High German scūr shower, storm, Latin caurus northwest wind Date: before 12th century
1. a fall of rain of short duration, a similar fall of sleet, hail, or snow, something resembling a rain shower , a party given by friends who bring gifts often of a particular kind , a bath in which water is showered on the body, showerless adjective showery adjective
II. verb
Date: 15th century
intransitive verb to rain or fall in or as if in a shower , to bathe in a shower, transitive verb
1. to wet (as with water) in a spray, fine stream, or drops, b. to cause to fall in a shower , to cause a shower to fall on , to give in abundance , showerer noun
III. noun
Date: 14th century
one that shows ; exhibitor