1. the fifth letter of the modern english alphabet.
2. any of the speech sounds represented by the letter e.
3. the fifth in a series.
4. something shaped like the letter E.
5. A grade that indicates failing status.
6. music the third tone in the scale of C major or the fifth tone in the relative minor scale.
7. music A key or scale in which E is the tonic.
8. music A written or printed note representing this tone.
9. music A string, key, or pipe tuned to the pitch of this tone.
10. mathematics the base of the natural system of logarithms, having a numerical value of approximately 2.71828.
11. the hypothesized traditional source of those narrative portions of the pentateuch in which god is referred to as elohim rather than with the Tetragrammaton.
12. electron

1. the fifth letter of the basic modern latin alphabet.
2. the base of natural logarithms, a transcendental number with a value of approximately 2.718281828459
3. close-mid front unrounded vowel
4. the fifth letter of the english alphabet, called e and written in the latin script.
5. the ordinal number fifth, derived from this letter of the english alphabet, called e and written in the latin script.
6. the name of the latin script letter E/e.
7. the base of the natural logarithm, 2.718281828459045…

1. the fifth letter of the english alphabet.
2. E is the third tone of the model diatonic scale. E♭ (E flat) is a tone which is intermediate between D and E.

1. the fifth letter and second vowel in our alphabet.
2. as a numeral, 250.
3. as a symbol: in the calendar, the fifth of the dominical letters.
4. in logic, the sign of the universal negative proposition. see A, 2.
5. in algebra: [capitalized] the operation of enlargement: thus, Efx = f (x + 1); also, the greatest integer as small as the quantity which follows: thus, . [l. c.] the base of the Napierian system of logarithms; also, the eccentricity of a conic.
6. in music: the key-note of the major key of four sharps, having the signature , or of the minor key of one sharp, having the signature ; also, the final of the phrygian mode in medieval music.
7. in the fixed system of solmization, the third tone of the scale, called mi: hence so named by french musicians.
8. on the keyboard of the pianoforte, the white key to the right of every group of two black keys.
9. the tone given by such a key, or a tone in unison with such a tone.
10. the degree of a staff assigned to such a key or tone; with the treble clef, the lower line and upper space .
11. A note on such a degree, indicating such a key or tone .
12. as an abbreviation: east: as, E. by S., east by south. see S. E., E. S. E., etc.
13. in various phrase-abbreviations. see e. g., i. e., E. and O. E., etc.
14. A prefix of anglo-saxon origin, one of the forms of the original prefix ge-. it remains unfelt in enough. see i-.
15. A prefix of latin origin, a reduced form of ex-, alternating with ex- before consonants, as in evade, elude, emit, etc. see ex-.
16. the unpronounced termination of many english words.
17. [capitalized] the sign of residuation (which see).
18. [capitalized] in chem., sometimes used as the symbol for erbium: more commonly er.
19. the common symbol for the modulus of elasticity, or the force, in pounds, required to stretch a bar of any material one square inch in cross-section until its length is increased by one hundred per cent.
20. in electricity, a symbol for electromotive force.
21. an abbreviation of earl;
22. of eastern;
23. of english;
24. in experimental psychology, of experimenter.

1. the base of the natural system of logarithms; approximately equal to 2.718282...
2. a fat-soluble vitamin that is essential for normal reproduction; an important antioxidant that neutralizes free radicals in the body
3. the 5th letter of the roman alphabet
4. the cardinal compass point that is at 90 degrees
5. a radioactive transuranic element produced by bombarding plutonium with neutrons