<p><strong>Noun:</strong></p><ul><li>a device for holding a door, gate, or the like, closed, consisting basically of a bar falling or sliding into a catch, groove, hole, etc.</li><li>a breastfeeding baby’s attachment or connection to the mother’s breast: A good, deep latch is important because it allows the infant to get enough milk.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>to close or fasten with a latch</li><li>to attach (a breastfeeding baby) to the breast: You should know how to properly latch your newborn.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>to close tightly so that the latch is secured: The door won't latch.</li><li>(of a breastfeeding baby) to be or become attached to the breast: Failure to latch can be the result of poor positioning of the baby.</li></ul><p><strong>Verb Phrase (Informal):</strong></p><ul><li>to take possession of; obtain; get</li><li>to acquire understanding of; comprehend</li><li>to attach oneself to; join in with: The stray dog latched onto the children and wouldn't go home.</li><li>to grab or hold on, as to an object or idea, especially tightly or tenaciously</li><li>to include or add in; attach: If we latch the tax on, the bill will come to over $100.</li></ul>