1. Noun: A lullaby is a soothing song, typically sung to infants to help them fall asleep. Lullabies are often characterized by their gentle melody, simple lyrics, and repetitive nature, which can create a calming effect and promote relaxation.
2. Verb: The verb "to lullaby" means to sing a lullaby or to soothe someone to sleep. It can be used both in a literal sense (e.g., "She lullabies her baby to sleep every night") and in a figurative sense (e.g., "The gentle waves lulled us to sleep").
3. Metaphorically, the term "lullaby" can be used to refer to anything that has a calming or soothing effect. For example, someone might describe a beautiful landscape as being like a "lullaby for the eyes," or they might talk about the "lullaby of the ocean waves" to evoke a sense of peace and serenity.
4. Lullaby can also be a genre of music specifically composed for the purpose of calming or inducing sleep. This genre typically includes slow-tempo, instrumental music or songs with soothing lyrics.
Overall, the word lullaby is associated with calmness, gentleness, and the act of soothing someone to sleep.