open chain
— Noun
– English
～ a chain of atoms in a molecule whose ends are not joined to form a ring
open house
— Noun
– English
～ an informal party of people with hospitality for all comers
open letter
— Noun
– English
～ a letter of protest; addressed to one person but intended for the general public
open
— Noun
– English
～ a clear or unobstructed space or expanse of land or water; "finally broke out of the forest into the open"
open-end fund
— Noun
– English
～ a regulated investment company with a pool of assets that regularly sells and redeems its shares
open account
— Noun
– English
～ credit extended by a business to a customer
open
— Noun
– English
～ information that has become public; "all the reports were out in the open"; "the facts had been brought to the surface"
open
— Noun
– English
～ where the air is unconfined; "he wanted to get outdoors a little"; "the concert was held in the open air"; "camping in the open"
open door
— Noun
– English
～ freedom of access; "he maintained an open door for all employees"
open-air marketplace
— Noun
– English
～ a public marketplace where food and merchandise is sold
open frame
— Noun
– English
～ any frame in which a bowler fails to make a strike or spare; "the break in the eighth frame cost him the match"
open account
— Noun
– English
～ an unpaid credit order
openbill
— Noun
– English
～ stork with a grooved bill whose upper and lower parts touch only at the base and tip
opencast mining
— Noun
– English
～ the mining of ore or coal from an open mine
opener
— Noun
– English
～ a hand tool used for opening sealed containers (bottles or cans)
opener
— Noun
– English
～ a person who unfastens or unwraps or opens; "children are talented undoers of their shoelaces"
opener
— Noun
– English
～ the first event in a series; "she played Chopin for her opener"; "the season's opener was a game against the Yankees"
openhandedness
— Noun
– English
～ liberality in bestowing gifts; extremely liberal and generous of spirit
opening move
— Noun
– English
～ the first of a series of actions
opening line
— Noun
– English
～ the first line of a piece of writing (as a newspaper story)