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Lettris
Lettris is a curious tetris-clone game where all the bricks have the same square shape but different content. Each square carries a letter. To make squares disappear and save space for other squares you have to assemble English words (left, right, up, down) from the falling squares.
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English dictionary
Main references
Most English definitions are provided by WordNet .
English thesaurus is mainly derived from The Integral Dictionary (TID).
English Encyclopedia is licensed by Wikipedia (GNU).
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The wordgames anagrams, crossword, Lettris and Boggle are provided by Memodata.
The web service Alexandria is granted from Memodata for the Ebay search.
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Translation
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1.a fortified defensive structure
2.a strongly fortified defensive structure
FortressFor"tress (?), n.; pl. Fortresses (#). [F. forteresse, OF. forteresce, fortelesce, LL. foralitia, fr. L. fortis strong. See Fort, and cf. Fortalice.] A fortified place; a large and permanent fortification, sometimes including a town; a fort; a castle; a stronghold; a place of defense or security.
Syn. -- Fortress, Fortification, Castle, Citadel. A fortress is constructed for military purposes only, and is permanently garrisoned; a fortification is built to defend harbors, cities, etc.; a castle is a fortress of early times which was ordinarily a palatial dwelling; a citadel is the stronghold of a fortress or city, etc.
FortressFor"tress, v. t. To furnish with a fortress or with fortresses; to guard; to fortify. Shak.
alcazar, burg, castle, citadel, fastness, fort, fortification, fortified castle, rook, stronghold
needlework; embroidery; fancywork; fortifications; ramparts; fortification; munition[Classe]
emplacement militaire stratégique (fr)[ClasseParExt.]
construction; edifice; building[Classe]
(arms; armaments; weaponry)[Thème]
construction, structure - place, post, send, station - close in, enclose, inclose, shut in - assemble, foregather, forgather, gather, meet - congregate[Hyper.]
fort, fortification, fortress, stronghold - fort, garrison - fortification, fortifications, munition, ramparts[Dérivé]
fortress; fort; stronghold; fortification[ClasseHyper.]
bâtiment à usage militaire (fr)[Classe]
military[Domaine]
StationaryArtifact[Domaine]
fortress (n.)
needlework; embroidery; fancywork; fortifications; ramparts; fortification; munition[Classe]
lieu clos (fr)[Classe]
lieu (fr)[Classe...]
prison; gaol; jail[Classe]
construction; edifice; building[Classe]
castle; stately home[Classe]
fortifications; ramparts; fortification; munition[Classe]
demeure d'un seigneur féodal (fr)[Classe]
fortress; fort; stronghold; fortification[Classe]
bâtiment à usage militaire (fr)[Classe]
(arms; armaments; weaponry)[Thème]
(château; castle)[Thème]
construction, structure[Hyper.]
fortifications; ramparts; fortification; munition[Classe]
forteresse (comme lieu de détention) (fr)[Classe]
bâtiment à usage militaire (fr)[Classe]
château; castle[Classe]
military[Domaine]
StationaryArtifact[Domaine]
fortress (n.)