Close in Definition 1 of 3Pro Tip 1/3Tactical Action Used in situations that describe a strategic move, often in a competitive or confrontational context. The wolves began to close in on their prey. Pro Tip 2/3Sense of Confinement Can imply a feeling of being trapped or having limited options. As the deadlines approached, he felt the walls close in. Pro Tip 3/3Simultaneous Movement Indicates multiple entities moving together towards a particular point or target. The defenders closed in, leaving no room for the attacker.