as it is; current state; without changing
Expresses that something remains in a certain state or is done without changing that state.
The word まま describes a situation that continues as it is, without alteration. When you say テレビをつけたまま寝ました, it means you left the TV on and slept, so the state of being on continued. It often implies that you do something while leaving another thing unchanged, or that you leave something in its current state. It can be used with verbs in the past tense to indicate an action was done and its result remains. With nouns, use のまま, like 生のまま means raw (as is). Also, このまま and そのまま are common as adverbs meaning 'as is'.