n. — in compounds, e.g. seniors lodge
a retirement home for seniors.
Type: 3. Semantic Change — The term lodge was likely applied to seniors' homes in relation to "a residence or hotel. (Freq. as the second element of house- or hotel-names.)" (see OED-3, s.v. "lodge" [4b] and the related meaning lodge ((1)) [4b] in DCHP-1). Compounds like seniors lodge are common in Canadian English (see Chart 1). Seniors lodge is a form used mostly from Ontario to BC, with a heavy concentration in Alberta (see Chart 1). Seniors' lodge is less common, although usage guides and grammar books would recommend the apostrophe as marking the possessive; however it is today often dropped in combinations where the first term is a plural noun marking an affiliation (e.g. "teachers union", "veterans club", etc.).
See also COD-2, s.v. "lodge" noun (3), which is marked "Cdn", "especially" in proper names.
See also: lodge ((1)) def. 4b
- 1970  MATURE conscientious high school or university student required for attendant duties in Retirement Lodge. 
- 1972  Second cook required immediately, in modern retirement lodge for senior citizens. For interview call 425-3722. 
- 1978  In 1836 he built a country cottage on a quarter section of land east of Grenadier Pond. He later added to it as a retirement residence, calling it Colborne Lodge. 
- 1981  "My husband and I join your other readers who urge more encouragement to private organizations to establish such accommodation: apartments in a retirement complex wth a nearby senior lodge when we need it and a nursing home if we need it. And most important - all this with a sense of security prevailing, something too often lacking now. (I recall your column about vandalism in Prince Edward Island.)" 
- 1988  It will also feature a new Seniors' Lodge, which will house up to 30 men and women in the Seniors' Abuse program. De La Perralle said there'd be as much interaction between the seniors and the youngsters as possible. 
- 1993  It was another 10 years before I came home again. Charlie was in the Mariposa Seniors Lodge up on Borland Street. I went to see him on Christmas Eve. The nurse said nobody had been to see him for months. 
- 1999  Like most women of her generation, mother spent her life taking care of others, first her husband, whom she helped support while he obtained several university degrees, then her daughters: Susan, Andrea and I, and, finally, the elderly at a seniors' lodge called the Medicine Tree Manor. 
- 2006  Jim Lawrence, 56, said his fraternal-twin John, living at Clover Lodge for the past three years, can rhyme off any historical event dating back thousands of years, but because of his schizophrenia often can't remember when to eat, take his medication or bathe. 
- 2013  FIFTY YEARS AGO [...] Lt.-Gov. Errick F. Willis officially opened the new Westview Lodge, a strictly modern retirement home in Boissevain. 
Images:
Chart 1: Internet Domain Search, 3 Mar. 2016
Chart 2: Regional Domain Search, 3 Mar. 2016