Colloquialism

[kuh-loh-kwee-uh-liz-uh m] /kəˈloʊ kwi əˌlɪz əm/

noun
1.
a expression.
2.
style or usage.
/kəˈləʊkwɪəˌlɪzəm/
noun
1.
a word or phrase appropriate to conversation and other informal situations
2.
the use of colloquial words and phrases
n.

1810, “a colloquial word or phrase,” from colloquial + -ism.

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Colloquiality
[kuh-loh-kwee-uh l] /kəˈloʊ kwi əl/ adjective 1. characteristic of or appropriate to ordinary or familiar conversation rather than formal speech or writing; informal. 2. involving or using conversation. /kəˈləʊkwɪəl/ adjective 1. of or relating to conversation 2. denoting or characterized by informal or conversational idiom or vocabulary Compare informal adjective pertaining to words or expressions […]
Colloquially
[kuh-loh-kwee-uh l] /kəˈloʊ kwi əl/ adjective 1. characteristic of or appropriate to ordinary or familiar conversation rather than formal speech or writing; informal. 2. involving or using conversation. /kəˈləʊkwɪəl/ adjective 1. of or relating to conversation 2. denoting or characterized by informal or conversational idiom or vocabulary Compare informal adjective pertaining to words or expressions […]
Colloquies
[kol-uh-kwee] /ˈkɒl ə kwi/ noun, plural colloquies. 1. a conversational exchange; dialogue. 2. a conference. /ˈkɒləkwɪ/ noun (pl) -quies 1. a formal conversation or conference 2. a literary work in dialogue form 3. an informal conference on religious or theological matters n. mid-15c., “discourse,” from Latin colloquium “conference, conversation,” literally “a speaking together,” from com- […]

Colloquium
[kuh-loh-kwee-uh m] /kəˈloʊ kwi əm/ noun, plural colloquiums, colloquia [kuh-loh-kwee-uh] /kəˈloʊ kwi ə/ (Show IPA) 1. a conference at which scholars or other experts present papers on, analyze, and discuss a specific topic. /kəˈləʊkwɪəm/ noun (pl) -quiums, -quia (-kwɪə) 1. an informal gathering for discussion 2. an academic seminar n. early 17c., “conversation, dialogue,” from […]
Colloquy
[kol-uh-kwee] /ˈkɒl ə kwi/ noun, plural colloquies. 1. a conversational exchange; dialogue. 2. a conference. /ˈkɒləkwɪ/ noun (pl) -quies 1. a formal conversation or conference 2. a literary work in dialogue form 3. an informal conference on religious or theological matters n. mid-15c., “discourse,” from Latin colloquium “conference, conversation,” literally “a speaking together,” from com- […]