Lexeme and Locution

Lexeme noun - A minimal unit (as a word or stem) in the lexicon of a language; `go' and `went' and `gone' and `going' are all members of the English lexeme `go'.

Locution and lexeme are semantically related. in unit of language topic. In some cases you can use "Locution" instead a noun "Lexeme".

Locution noun - A distinctive way of putting ideas into words.

Lexeme and locution are semantically related. You can use "Lexeme" instead a noun "Locution".