¹ block noun

• a solid piece of material (such as rock or wood) that has flat sides and is usually square or rectangular in shape
• an area of land surrounded by four streets in a city
• the length of one city block

² block verb

• to be placed in front of (something, such as a road or path) so that people or things cannot pass through —sometimes + up
• to place something in front of (something, such as a road) so that people or things cannot go into the area —often + off
• to stop (someone or something) from moving through or going by