Open flank(Fort.), the part of the flank covered by the orillon.Open-front furnace(Metal.), a blast furnace having a forehearth.Open harmony(Mus.), harmony the tones of which are widely dispersed, or separated by wide intervals.Open hawse(Naut.), a hawse in which the cables are parallel or slightly divergent. Cf. Foul hawse, under Hawse.Open hearth(Metal.), the shallow hearth of a reverberatory furnace.Open-hearth furnace, a reverberatory furnace; esp., a kind of reverberatory furnace in which the fuel is gas, used in manufacturing steel.Open-hearth process(Steel Manuf.), a process by which melted cast iron is converted into steel by the addition of wrought iron, or iron ore and manganese, and by exposure to heat in an open-hearth furnace; — also called the Siemens- Martin process, from the inventors.Open-hearth steel, steel made by an open-hearth process; — also called Siemens-Martin steel.Open newel. (Arch.) See Hollow newel, under Hollow.Open pipe(Mus.), a pipe open at the top. It has a pitch about an octave higher than a closed pipe of the same length.Open- timber roof(Arch.), a roof of which the constructional parts, together with the under side of the covering, or its lining, are treated ornamentally, and left to form the ceiling of an apartment below, as in a church, a public hall, and the like.Open vowelor consonant. See Open, a., 9.

Open is used in many compounds, most of which are self-explaining; as, open-breasted, open-minded.

Syn. — Unclosed; uncovered; unprotected; exposed; plain; apparent; obvious; evident; public; unreserved; frank; sincere; undissembling; artless. See Candid, and Ingenuous.

Open
(O"pen) n. Open or unobstructed space; clear land, without trees or obstructions; open ocean; open water. "To sail into the open." Jowett (Thucyd. ).

Then we got into the open.
W. Black.

In open, in full view; without concealment; openly. [Obs.] Beau. & Fl.

Open
(O"pen) v. t. [imp. & p. p. Opened ; p. pr. & vb. n. Opening.] [AS. openian. See Open,a.]

1. To make or set open; to render free of access; to unclose; to unbar; to unlock; to remove any fastening or covering from; as, to open a door; to open a box; to open a room; to open a letter.

And all the windows of my heart
I open to the day.
Whittier.

2. To spread; to expand; as, to open the hand.

3. To disclose; to reveal; to interpret; to explain.

The king opened himself to some of his council, that he was sorry for the earl's death.
Bacon.

Unto thee have I opened my cause.
Jer. xx. 12.

While he opened to us the Scriptures.
Luke xxiv. 32.

4. To make known; to discover; also, to render available or accessible for settlements, trade, etc.

The English did adventure far for to open the North parts of America.
Abp. Abbot.

5. To enter upon; to begin; as, to open a discussion; to open fire upon an enemy; to open trade, or correspondence; to open a case in court, or a meeting.

6. To loosen or make less compact; as, to open matted cotton by separating the fibers.

mouthpiece of a flageolet at the end where the wind enters, and are open at the other end.


  By PanEris using Melati.

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