"border or weather-guard affixed to the edge of a door, fitting tightly against the casing when it is closed," 1849, from door + strip (n.).
Entries linking to door-strip
door n.
"movable barrier, commonly on hinges, for closing a passage into a building, room, or other enclosure," c. 1200, a Middle English merger of two Old English words, both with the general sense of "door, gate": dor (neuter; plural doru) "large door, gate," and duru (fem., plural dura) "door, gate, wicket." The difference (no longer felt in Old English) was that the former came from a singular form, the latter from a plural.
Both are from Proto-Germanic *dur-, plural *dures (source also of Old Saxon duru, Old Norse dyrr, Danish dr, Old Frisian dure, dore, dure, Old High German turi, German Tür). This is from PIE root *dhwer- "door, doorway."
Middle English had both dure and dor; the form dore predominated by 16c. but was supplanted later by door. The oldest forms of the word in IE languages frequently are dual or plural, leading to speculation that houses of the original Indo-Europeans had doors with two swinging halves.
Figurative sense of "means of opportunity or facility for" was in Old English. Phrase door to door "house to house" is from c. 1300; as an adjective, in reference to sales, by 1902.
A door is what a dog is perpetually on the wrong side of. [Ogden Nash]
strip n.
"long, narrow, flat piece," mid-15c., "narrow piece of cloth," probably related to or from Middle Low German strippe "strap, thong," and from the same source as stripe (n.1). Sense extension to wood, land, etc. first recorded 1630s.
Sense in comic strip is from 1920. Airport sense is from 1936; race track sense from 1941. Meaning "street noted for clubs, bars, etc." is attested from 1939, originally in reference to Los Angeles' Sunset Strip. Strip mine (n.) attested by 1892, as a verb by 1916; so called because the surface material is removed in successive parallel strips.