x

Short definition from Wiktionary

Character

1. 1
   The twenty-fourth letter of the English alphabet, called ex and written in the Latin script.
2. 2
   Forming gender-neutral or otherwise more inclusive versions of words, especially Spanish-derived words by replacing both the masculine -o and feminine -a.
3. 3
   The twenty-fourth letter of the English alphabet, called ex and written in the Latin script.

Adjective

1. 1
   Alternative letter-case form of X (“intersex or non-binary (in passports and identification documents)”).
2. 2
   Intersex or non-binary (in passports and identification documents).
3. 3
   Suitable only for those aged sixteen or (later) eighteen years and over.
4. 4
   Obscene; adult; pornographic; XXX.
5. 5
   Abbreviation of extreme.

Numeral

1. 1
   An unknown or unspecified number of.
2. 2
   An unknown quantity or unknown value.
3. 3
   The Roman numeral ten (10).
4. 4
   The tenth.

Conjunction

1. 1
   Used between the names of two characters to denote a ship, particularly in anime, manga, and video games.
2. 2
   Used in place of and in artist collaborations.

Symbol

1. 1
   The sound sequence /ɛks/ or /ks/.
2. 2
   The suffix or final sequence /iəs/ (-ious, -eous, -eus).
3. 3
   The suffix or final syllable /ʃəs/ (-tious, -cious, -xious).
4. 4
   The suffix or final syllable /ʃəl/ (-tial, -cial).
5. 5
   A unit of transfer rate of CD drives, equal to 150 KiB per second.
6. 6
   A unit of transfer rate of DVD drives, equal 1.32 MiB per second.
7. 7
   Ⅹ, the Roman numeral ten (10).

Proper noun

1. 1
   A placeholder for an unknown, suppressed or hypothetical name.
2. 2
   A surname, used by those who have had their identity or heritage, including their proper ancestral names, erased or forgotten.
3. 3
   An online social media network, formerly known as Twitter.
4. 4
   Christ

Noun

1. 1
   Any mark that looks like that letter, such as a mark made by a person who cannot read or write in lieu of a signature.
2. 2
   The spot behind the goal.
3. 3
   Ecstasy, a particular street drug.
4. 4
   Cross, crossing.

Verb

1. 1
   Alternative spelling of ex (“to delete; to cross out”).