V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
Entry जागरणम्
जागरणम्jāgaraṇamWaking, wakefulness.
[जागृ भावे ल्युट्]
Waking, wakefulness.
Watchfulness, vigilance.
Sitting up at night as a part of a religious ceremony.