The Collaborative International Dictionary of English v.0.48:

Phone \Phone\, n. [Colloq. for Telephone.]
   1. An instrument that converts sound into signals that can be
      transmitted over distances and then converts received
      signals back into sounds; a telephone; as, I talked to him
      on the phone.

   Syn: telephone, telephone set.
        [WordNet 1.5]

   2. (Phonetics) An individual sound unit of speech without
      concern as to whether or not it is a phoneme of some
      language. A speech sound.

   Syn: speech sound, sound.
        [WordNet 1.5]

   3. A device for converting electric signals into sounds; it
      is held over or inserted into the ear.

   Syn: earearpiece, headphone, phone.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

phone \phone\, v. t.
   To get or try to get into communication with, using a
   telephone; as, I phoned him this morning.

   Syn: call, telephone, call up, ring.
        [PJC]

              E. T. phone home.                   --E. T. (the
                                                  movie)
        [PJC]

WordNet (r) 3.0 (2006):

phone
    n 1: electronic equipment that converts sound into electrical
         signals that can be transmitted over distances and then
         converts received signals back into sounds; "I talked to
         him on the telephone" [syn: telephone, phone,
         telephone set]
    2: (phonetics) an individual sound unit of speech without
       concern as to whether or not it is a phoneme of some language
       [syn: phone, speech sound, sound]
    3: electro-acoustic transducer for converting electric signals
       into sounds; it is held over or inserted into the ear; "it
       was not the typing but the earphones that she disliked" [syn:
       earphone, earpiece, headphone, phone]
    v 1: get or try to get into communication (with someone) by
         telephone; "I tried to call you all night"; "Take two
         aspirin and call me in the morning" [syn: call,
         telephone, call up, phone, ring]

Moby Thesaurus II by Grady Ward, 1.0:

118 Moby Thesaurus words for "phone":
   allophone, alveolar, amplitude, apico-alveolar, apico-dental,
   articulation, aspiration, assimilation, auditory effect,
   auditory phenomenon, bilabial, buzz, cacuminal, call, call box,
   call up, cerebral, check, coin telephone, consonant, continuant,
   dental, desk telephone, dial, dial telephone, diphthong,
   dissimilation, earphone, epenthetic vowel, explosive, extension,
   give a ring, glide, glottal, glottalization, guttural, hang up,
   headphone, hold the phone, hydrophone, idiophone, labial,
   labialization, labiodental, labiovelar, laryngeal, lateral,
   lingual, liquid, listen in, loudness, make a call,
   manner of articulation, microphone, modification, monophthong,
   morphophoneme, mouthpiece, mute, nasal, noise, occlusive,
   optophone, palatal, parasitic vowel, pay station, peak, pharyngeal,
   pharyngealization, phoneme, plosive, prothetic vowel,
   public telephone, push-button telephone, radiophone,
   radiotelephone, receiver, retroflex, ring, ring off, ring up,
   segmental phoneme, semivowel, sonance, sonant, sonority, sound,
   sound intensity level, sound propagation, sound wave, speech sound,
   stop, surd, syllabic nucleus, syllabic peak, syllable, telephone,
   telephone booth, telephone engineering, telephone extension,
   telephone mechanics, telephone receiver, telephonics, telephony,
   transition sound, transmitter, triphthong, ultrasound, velar,
   vocable, vocalic, vocoid, voice, voiced sound, voiceless sound,
   voicing, vowel, wall telephone