To heat and brown (bread, for example) by placing in a toaster or an oven or close to a fire. To warm thoroughly, as before a fire: toast one's feet. To become toasted: This bread toasts well. Sliced bread heated and browned. Slang One that is doomed, in trouble, or unworthy of further consideration. The act of raising a glass and drinking in honor of or to the health of a person or thing. A proposal to drink to someone or something or a speech given before the taking of such a drink. The one honored by a toast. A person receiving much attention or acclaim: the toast of Broadway. To drink to the health or honor of. To propose or drink a toast.