1. Thoroughly.

2. The time when things are most still or dead; those dead.

3. Having ceased to live; without life; death like; still or motionless as death; blank; sure as death; useless; unprofitable; unreal; dull; tasteiess; vapid; deep; not acting; spiritless; without spiritual life, or the principle of Christian life; cut off from the rights of a citizen; not glossy; not gay or bright. The dead, dead men. Dead language, a language which is no longer spoken, and known only in writings, as the Hebrew, Greek, and Latin. Dead-lock, a complete standstill from complication.

4. Bringing death; deadly.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• deas,
• deald,
• dea,
• deap,
• decaid,
• ideat,
• dedk,
• deatr,
• adeau,
• deast,
• deade,
• aead,
• idead,
• doard,
• dredd,
• deat,
• dhard,
• deads,
• deaer,
• delaid

• on-duty,
• DADD,
• tatty,
• tyto,
• Tottie,
• dyeweed,
• Tadao,
• tatu,
• toot,
• D40TA,
• Tadea,
• toetoe,
• Taitt,
• Teddey,
• Dewit,
• TOTO,
• duad,
• twit,
• bead,
• Dodd,
• rat-tat,
• toady,
• Didier,
• TIOTE,
• doodia,
• off-duty,
• TEDA,
• Doat,
• DTD,
• Tayte,
• Tadda,
• Tutti,
• Teed,
• dread,
• teddy,
• Tead,
• Dody,
• dat,
• dado,
• Tait,
• DETAI,
• Teewit,
• dote,
• dyed,
• Died,
• dido,
• Didi,
• Doit,
• diet,
• Twight,
• duette,
• date,
• Tita,
• deed,
• toddy,
• ded,
• Dewoody,
• DIAD,
• tad,
• DHD,
• Tid,
• tot,
• tote,
• Totty,
• Tewtaw,
• Tuet,
• DEET,
• Tut,
• Did,
• DET/DETT,
• Tatta,
• ted,
• Tyta,
• DET/Det,
• DETA,
• Dawud,
• Doty,
• Taddie,
• Tidde,
• dod,
• Tutty,
• DITTA,
• lead,
• DTT,
• Fin-toed,
• DYODD,
• tidy,
• deady,
• Dodey,
• DOTT,
• tted,
• Dwight,
• teiidae,
• Dead-eye,
• doughty,
• diode,
• DHT,
• Deuto-,
• TWD,
• tight,
• Tewhit,
• tattoo,
• Tut-nose,
• tweet,
• Tadi,
• Dead-pay,
• Dede,
• TEWT,
• taut,
• DeWitt,
• Tatt,
• Tedd,
• toitoi,
• Tawed,
• dhoti,
• teat,
• Touite,
• dotty,
• TIDA,
• dit,
• tutee,
• Twaite,
• tideway,
• tweed,
• dodo,
• tate,
• tod,
• Toat,
• Tut-work,
• Tete,
• TUTA,
• DDD,
• DATU,
• Teetee,
• Tadd,
• Doda,
• Datya,
• Dite,
• DWT,
• tat,
• Tadio,
• tatou,
• Tada,
• sea-duty,
• today,
• Taddeo,
• TWT,
• Tadeo,
• tito,
• Daud,
• dot,
• Dodie,
• DATT,
• todd,
• Teddie,
• todea,
• DUT,
• Datyah,
• dud,
• Dottie,
• TUT7,
• Tuyet,
• tide,
• D4T,
• Tiet,
• wren-tit,
• ddt,
• tweedy,
• tatouay,
• DET,
• Dottey,
• DID/DOD,
• Toty,
• Twaddy,
• TDD,
• tied,
• TEDI,
• duty,
• Dodee,
• Dawid,
• Ditt,
• Teeta,
• dad,
• Tota,
• deal,
• dear,
• tat-tat,
• Deut-,
• Dight,
• tutu,
• dita,
• daddy,
• Tewed,
• ditto,
• titi,
• TOTT,
• tet,
• dead-on,
• Dodi,
• Diddie,
• Tatie,
• dowdy,
• Tata,
• data,
• deadeye,
• duet,
• twat,
• Teade,
• Deedy,
• Teddi,
• TOYOTA,
• Dout,
• Taotai,
• web-toed,
• Detta,
• Tadeu,
• deity,
• tody,
• dyewood,
• Dedie,
• Twite,
• teiid,
• Towed,
• TITU,
• DotA,
• tdt,
• tut-tut,
• Dwade,
• TTT,
• TTD,
• toed,
• ditty,
• dead-end,
• toda,
• toad,
• tati,
• Dewed,
• tout,
• Diota,
• head,
• dada,
• dyad,
• deaf,
• Tetty,
• DAAD,
• Twighte,
• Tydy,
• Deetta,
• Dette,
• toyed,
• DUAT,
• Diot,
• Dade,
• Duetto,
• WDJT,
• read,
• DeeDee,
• dude.

The adverb form of the word "dead" is "deadly".

The adjective form of the word "dead" is "lifeless" or "deceased".

The plural form of "dead" remains the same, it does not change.

The singular form of the word "dead" is "dead". The word "dead" is an adjective that does not change when used in the singular form.