GG5: 偲ぶ会 a gathering to remember a dead person; a get-together in memory of 《Mr. Yokota》
- 黒岩氏を偲ぶ会を催した. We had a gathering to talk and reminisce about (the late) Mr. Kuroiwa.

It's not really a service, which usually means a religious ceremony. I think it was better as it was. Those xrefs are not really useful or relevant.

@@ -13,5 +13 @@
-<xref type="see" seq="2741520">お別れ会</xref>
-<xref type="see" seq="2741520">お別れ会</xref>
-<xref type="see" seq="1286100">告別式・1</xref>
-<gloss>memorial service</gloss>
-<gloss>memorial gathering</gloss>
+<gloss>gathering to remember a dead person</gloss>
@@ -19 +14,0 @@
-<gloss g_type="expl">gathering to remember a deceased person (esp. more secular, social events. usu. not for pets)</gloss>

See notes on お別れ会。　

Cannot xref unapproved お別れ会[2], so if approved, that will need to be edited.

[expl] differs by excluding pets explicitly (lest it appear as a possible oversight).

"memorial" is more literal here and not euphemistic. Otherwise these terms appear to be used interchangeably. Professional services frequently write お別れ会(偲ぶ会), 
or  お別れ会・偲ぶ会.

@@ -13 +13,5 @@
-<gloss>gathering to remember a dead person</gloss>
+<xref type="see" seq="2741520">お別れ会</xref>
+<xref type="see" seq="2741520">お別れ会</xref>
+<xref type="see" seq="1286100">告別式・1</xref>
+<gloss>memorial service</gloss>
+<gloss>memorial gathering</gloss>
@@ -14,0 +19 @@
+<gloss g_type="expl">gathering to remember a deceased person (esp. more secular, social events. usu. not for pets)</gloss>

@@ -10,0 +11 @@
+<pos>&exp;</pos>

@@ -8 +8 @@
-<reb>しぬぶかい</reb>
+<reb>しのぶかい</reb>

GG5. From the n-grams this is by far the most common prenominal use of 偲ぶ.