diff --git a/man2/fcntl.2 b/man2/fcntl.2
index d55261cd0..18423426b 100644
--- a/man2/fcntl.2
+++ b/man2/fcntl.2
@@ -47,7 +47,7 @@
 .\" 2004-12-10, mtk, noted F_GETOWN bug after suggestion from aeb.
 .\" 2005-04-08 Jamie Lokier <jamie@shareable.org>, mtk
 .\"	Described behavior of F_SETOWN/F_SETSIG in
-.\"	multi-threaded processes, and generally cleaned
+.\"	multithreaded processes, and generally cleaned
 .\"	up the discussion of F_SETOWN.
 .\" 2005-05-20, Johannes Nicolai <johannes.nicolai@hpi.uni-potsdam.de>,
 .\"	mtk: Noted F_SETOWN bug for socket file descriptor in Linux 2.4
@@ -514,7 +514,7 @@ would report the socket as having an "exceptional condition".)
 
 If a non-zero value is given to
 .B F_SETSIG
-in a multi-threaded process running with a threading library
+in a multithreaded process running with a threading library
 that supports thread groups (e.g., NPTL),
 then a positive value given to
 .B F_SETOWN
diff --git a/man2/signal.2 b/man2/signal.2
index 7840503d6..5b6cece7d 100644
--- a/man2/signal.2
+++ b/man2/signal.2
@@ -107,7 +107,7 @@ C89, C99, POSIX.1-2001.
 .SH NOTES
 The effects of
 .BR signal ()
-in a multi-threaded process are unspecified.
+in a multithreaded process are unspecified.
 .PP
 According to POSIX, the behavior of a process is undefined after it
 ignores a
diff --git a/man3/mbsnrtowcs.3 b/man3/mbsnrtowcs.3
index 3ce58f198..61e137636 100644
--- a/man3/mbsnrtowcs.3
+++ b/man3/mbsnrtowcs.3
@@ -100,7 +100,7 @@ depends on the
 category of the
 current locale.
 .PP
-Passing NULL as \fIps\fP is not multi-thread safe.
+Passing NULL as \fIps\fP is not multithread safe.
 .SH "SEE ALSO"
 .BR iconv (3),
 .BR mbsrtowcs (3)
diff --git a/man3/mbsrtowcs.3 b/man3/mbsrtowcs.3
index 9ef889c65..0aaf70ba6 100644
--- a/man3/mbsrtowcs.3
+++ b/man3/mbsrtowcs.3
@@ -91,7 +91,7 @@ depends on the
 category of the
 current locale.
 .PP
-Passing NULL as \fIps\fP is not multi-thread safe.
+Passing NULL as \fIps\fP is not multithread safe.
 .SH "SEE ALSO"
 .BR iconv (3),
 .BR mbsnrtowcs (3),
diff --git a/man3/mbtowc.3 b/man3/mbtowc.3
index fe25a2325..24ae99e9d 100644
--- a/man3/mbtowc.3
+++ b/man3/mbtowc.3
@@ -83,7 +83,7 @@ depends on the
 category of the
 current locale.
 .PP
-This function is not multi-thread safe.
+This function is not multithread safe.
 The function
 .BR mbrtowc (3)
 provides
diff --git a/man3/wcrtomb.3 b/man3/wcrtomb.3
index 0836ba61b..a782bbb71 100644
--- a/man3/wcrtomb.3
+++ b/man3/wcrtomb.3
@@ -79,6 +79,6 @@ depends on the
 category of the
 current locale.
 .PP
-Passing NULL as \fIps\fP is not multi-thread safe.
+Passing NULL as \fIps\fP is not multithread safe.
 .SH "SEE ALSO"
 .BR wcsrtombs (3)
diff --git a/man3/wcsnrtombs.3 b/man3/wcsnrtombs.3
index 20094f11a..85fd5bce9 100644
--- a/man3/wcsnrtombs.3
+++ b/man3/wcsnrtombs.3
@@ -103,7 +103,7 @@ depends on the
 category of the
 current locale.
 .PP
-Passing NULL as \fIps\fP is not multi-thread safe.
+Passing NULL as \fIps\fP is not multithread safe.
 .SH "SEE ALSO"
 .BR iconv (3),
 .BR wcsrtombs (3)
diff --git a/man3/wcsrtombs.3 b/man3/wcsrtombs.3
index 841171922..34187f7be 100644
--- a/man3/wcsrtombs.3
+++ b/man3/wcsrtombs.3
@@ -97,7 +97,7 @@ depends on the
 category of the
 current locale.
 .PP
-Passing NULL as \fIps\fP is not multi-thread safe.
+Passing NULL as \fIps\fP is not multithread safe.
 .SH "SEE ALSO"
 .BR iconv (3),
 .BR wcsnrtombs (3),
diff --git a/man3/wctomb.3 b/man3/wctomb.3
index 7b8ca68e3..6b11b5a2e 100644
--- a/man3/wctomb.3
+++ b/man3/wctomb.3
@@ -71,7 +71,7 @@ depends on the
 category of the
 current locale.
 .PP
-This function is not multi-thread safe.
+This function is not multithread safe.
 The function
 .BR wcrtomb (3)
 provides