2. Noun. (figuratively) A shower stall and associated hardware made partially of aluminum. ¹
3. Noun. (figuratively aviation) The result of a midair collision of two aircraft. ¹
4. Noun. (literally) A party or similar event at which aluminum household items are given, as for a wedding. ¹
5. Noun. (figuratively) An event at which people give household items made of aluminum to the war effort. ¹
¹ Source: wiktionary.com