Quick definitions from WordNet (lull)

▸ noun:  a period of calm weather ("There was a lull in the storm")
▸ noun:  a pause during which things are calm or activities are diminished
▸ verb:  become quiet or less intensive ("The fighting lulled for a moment")
▸ verb:  calm by deception ("Don't let yourself be lulled into a false state of security")
▸ verb:  make calm or still
▸ name:  A surname (very rare: popularity rank in the U.S.: #30045)

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▸ Also see lull