Meanings

real intention

principal residence

plenary session

main building (as opposed to an annex, outbuilding, etc.)

stronghold

contract (entered into on the basis of a promise or previous agreement)

textbook

basic concept

main section (of a magazine or journal)

police headquarters

official sumo tournament (six per year)

this proposal

headquarters

original home

original home

regularization

true meaning

main thread (of a story)

pure silk

picture book