Containers are also an abstract data type who's primary purpose is to contain other data [1], Containers are a concept in type theory related to collections [2]. Web Containers are the parts of a web server that interact with Java Servlets [3]. OLE Containers are a technology for embedding content in editors such as Word [4]. AVI is a multimedia container format that can contain audio and video encoded in various codecs (as is MP4) [5].

Operating-system-level virtualization never had a monopoly on the word container, and as long as there's no potential for confusion I don't see why it should.

1: https://en.wikipedia.org/wiki/Container_(abstract_data_type) 2: https://en.wikipedia.org/wiki/Container_(type_theory) 3: https://en.wikipedia.org/wiki/Web_container 4: https://en.wikipedia.org/wiki/Object_Linking_and_Embedding 5: https://en.wikipedia.org/wiki/Audio_Video_Interleave

Kernel security feature pollutes the term container, which for ages has meant something that contains.

Anybody with context can trivially differentiate between the two...

There's a shipping industry that would like to have a word with you...