(often pluralized) A method of long-distance communication sometimes used in ancient and undeveloped societies, consisting of messages conveyed by means of columns or intermittent puffs of smoke.

(idiomatic) An informal method for determining whether something is authentic, credible, or ethical, by using one's common sense or sense of propriety.

plural of small saphenous vein

(programming, informal) To corrupt the call stack, causing execution to jump to a random address, sometimes used as a malicious attack on a system.

(baseball, slang) To consistently pitch fastballs that are difficult to hit.

Alternative spelling of smoky quartz

(apiculture) A device that releases smoke intended to distract bees.

plural of smart card

plural of small ubiquitin-related modifier

(US, derogatory) Suited to, or typical of, a small town or its inhabitants (suggesting lack of knowledge of the wider world).